Still can't figure out what's wrong with me... any advice welcome.

I'm about to turn 22, and my problems started right after I turned 21. Started with some spells of fatigue and nausea, then in April I came down with some kind of viral infection... might have been coxsackie because I had a lot of chest/rib inflammation but I never figured out what it was. Recovered and felt pretty good for two weeks, then in the middle of May I started getting the dizzy/fatigued/nauseous spells telling me I was getting sick again, and then I got what I thought was a stomach virus but it never fully went away. For a while I was waking up every morning and vomiting like a pregnant woman, and I could barely eat anything. But I did have good days where I felt pretty good. The symptoms were really off and on. I was also constantly lightheaded/dizzy, and had some weird symptoms like hair loss and slight weakness in the left side of my body. I also had a lot of gas and bloating and would belch all the time. I had heart palpitations and anxiety, and headaches a few times a month. Finally, I started noticing that I had to eat at least every two hours or I would get really lightheaded, and because I was nauseous a lot I had to force myself to eat.
So that's how I felt from May to September with gradual improvement. In October, November, and December I felt better but hit a plateau. The main symptoms that lingered were the off and on lightheadedness, needing to eat frequently, on and off nausea, and gas pains. Then in January I started getting slightly worse... more stomach issues than I'd had in the last couple months, more lightheaded feelings, couldn't go as long without eating, etc. February has been horrible. Fatigue, nausea, feeling like my blood sugar is crashing even though it's normal, headaches, lightheaded, and more. The past few days I have been feeling weak and lethargic like I'm coming down with some kind of viral infection even though I don't think I am. Got out of the shower last night and my legs and arms were weak and shaky.

I have been tested for HIV, hepatitis C, had a CBC with differential, complete chemical profile, lyme disease test, gluten intolerance test, thyroid (was borderline hyperthyroid but had no antibodies), ANA antibodies, and more. Does anyone have any other ideas?

Thanks. I refused to believe a CFS diagnosis for a long time because I didn't feel very tired, and I still don't usually feel THAT tired (I do sleep a lot though)... I think I will try cutting out gluten again, I tend to feel better when I'm not eating it.
The scariest symptom that's popped up in the last couple weeks is weakness in my arms and legs. I keep thinking I have MS. But it comes and goes so I don't think it is. I also have symptoms that mimic reactive hypoglycemia but my blood sugar level is never abnormal so I'm not sure what's going on there, but it's getting harder and harder to manage. I have to eat CONSTANTLY.
I have a doctor's appointment on Wednesday, I hope they will help but I have a feeling they won't. I'd like to at least be referred to a specialist.

I have lyme, and like most I didnt get treatment for years.
I had alot of symtomes that moved around, by the time I would go to the doctor and explain everything, it was changing to another symtom.
any way, most of the natural treatments and diet for lyme could help you feel better regardless.

Many with CFS or related fatigue can have adrenal or thyroid problems. Usually a normal doctor won't interpret results correctly. That's if they even order correct tests to begin with!

Saliva cortisol testing and hormones are a good start. A naturopath can order these and interpret them well to see if theres problems with your adrenals. Cortisol is an essential hormone for life and function.

Thyroid tests can be "within lab ranges" yet not be at a "good range for your body." So again, having a great naturopath familiar with this, can help order and interpret correct thyroid tests.

Two essential things to rule out for EVERYONE with CFS.

After that, we then have tests for vitamins and heavy metals. Iron levels. Vit D is an ESSENTIAL test for EVERYONE who comes across this thread on the internet and forum. Vit D is one of the most important things for functioning and immune system and should be near the upper end of the reference range.

Leaky gut tests and bacteria in the gut.

Many with CFS have some pretty horrible symptoms, and have gone on to get Lyme disease tests, with many coming back positive, and the diagnosis being changed.

Do as many tests as possible and make sure all are treated and in optimum functioning ranges. There's no point not treating or fixing something, that can be treated or at least lessen the symptoms.

Just a starting point for all with CFS. Then you can move on to other tests and possible causes. Nobody should just accept the diagnosis and leave it at that.

To improving health, and lessening symptoms.