Hi, Herby, and welcome! First of all, fibromyalgia affects all four quandrants of your body. If you divided your body down the middle and then divided it at the waist, you would have the four quandrants. Pain occurs in all four quandrants with fibro but not necessarily at the same time. You might only have two quandrants bothering you one day, maybe three or one the next day, etc. Symmetrical pain is when the pain is in the same area on both sides of your body. If your right knee hurts, then your left knee hurts. This happens with rheumatoid arthritis but not necessarily with fibro. You can have symmetrical pain but not always. I rarely have symmetrical pain. But, you will have tender areas on all four quandrants and you might have one shoulder hurting on one side and your hip on the other side. Or both sides of your back hurt. That's how I am.
I hope you have had a chance to dig into Fibro 101, as many have suggested. There is a wealth of information there and this will help you see if you do have fibro. Good starting links for you would be the ones called Symptoms, What Else Could It Be, and A Thorough Explanation of Fibromyalgia. You just might see yourself there. Of course we are here to help you with any questions, too.
I think the first and most important thing you can do to help your illness is to find a good doctor. If your doctor dismissed you about possibly having fibro because your joints weren't swollen enough, that sends up about 10 red flags! Fibromyalgia is an illness of the muscles, tendons, and ligaments possibly caused by neurological problems. It is not a disease of the joints and it also is not an inflammatory illness....inflammation is what causes swelling. I mean, this is basic information, for heaven's sakes! You need to find a good, board certified rheumatologist that also treats fibromyalgia patients. There are still some doctors out there in the Dark Ages when it comes to fibromyalgia even though it's recognized by the American Medical Association, the American College of Rheumatology, the National Institutes of Health, and the World Health Organization just to name a few. This is not all in your head. It is not caused by depression either. Many people have depression but do not fibro but having chronic pain can cause you to be depressed. I say "can" because I do not have depression.
I have excellent doctors and I do believe most doctors are quite dedicated. Yes, there are some like what Fibro$uffer mentioned but it's been my experience that it isn't the norm. I'm sorry she has dealt with these types of doctors. My doctors are board certified, diplomates (that means they get tested I think every year to make sure they are on the cutting edge of what is going on in medicine) and my Internist and Rheumatologist are affiliated with a medical school in my area. They work from 8 AM to 6 PM...longer than most working people. And after that, they are doing hospital visitations so, they don't have a lot of time for golf. 
I use ibuprofen with food, Tylenol, malic acid/magnesium supplements, vitamin D3 supplements, and a prescription muscle relaxer for my fibro. There are links about the supplements in Fibro 101 and how they work in your body. If you don't have enough of these vitamins and supplements, you can have more pain. I also do daily stretching exercises, I walk as my form of daily gentle exercise and I also swim in the summer. Lastly I pace myself when doing things.
What has helped me sooo much is keeping a positive attitude. I look at all the things I CAN do and don't dwell on the things that are more difficult to do. I usually can find ways to work around the difficult areas to do what I want to do anyway. If you made a list of the positive and negative things in your life, the positive list would be a lot longer. You need to remember things like family, the fact you can see and hear, the flowers and pets that bring you joy, etc. I'm legally deaf but I'm so thankful I can see just fine. I only need glasses to drive so I can read street signs from further away. I can use the computer and be in contact with family and friends, etc. See what I mean? There is a great link in Fibro 101 about maintaining a positive attitude with chronic pain. It has been proven a positive attitude helps greatly with illnesses and I'm a good example of that.
Anyway, do get thoroughly checked out. A good rheumy will run you through a myriad of tests to rule out other illnesses that have many of the same symptoms as fibro. Unfortunately there is not a good test to see if you have fibro so they have to rule the others out first. Once you have done that, then you will know what you are dealing with and can move forward in your life. You very well could have fibro. I have pain in the middle and lower back, pain in my shoulder and neck. Sometimes a hip will hurt, or a foot or ankle, etc. and the pain usually isn't the same from one day to another....except the back pain. But I also have a disease of the spine that is causing a lot of that pain. Some of this sounds like you, doesn't it? I also had a flat rash on my stomach a few hours before fibro hit me 26 years ago. But, you know what? I've had a full and enjoyable life in spite of this illness so I know you can, too.
I'm looking forward to getting to know you better. Don't hesitate to ask questions because we are here to help you. I hope to hear more from you soon.
Sherrine