I would love some insight

This is going to be long, I apologize now. I have Hashimotos, but after my last daughter (18 mo) my pain changed from annoying, to crippling. I can not tell you how many appointments I have been to. The Dr. thinks I may have Lupus, as I do have some markers. However; I am started to wonder if I have MS. I think my journey is difficult as I do have other symptoms due to my Hashis, so I will list them all, and I would appreciate feedback. I hate to pay for an MRI as we have already used our FSA this year if they don't seem to fit. Also, I started Cymbalta, I requested it because I heard it may help with nerve pain, my pain level went from a 10+ to a 3, almost overnight. It has helped SO much, and generally only gets bad when I way over do it (like Easter weekend perhaps). RA and Connective tissue diseases have been ruled out. Okay, below are my "main" symptoms:
*Severe body pain, Left foot, right knee, hips, right shoulder, base of skull, some of the left shoulder, right elbow and hand
*burning sensation of the right arm, from the shoulder down to the hand, it would truly feel like it is on fire. The first time it happened I was feeling my arm for the flame(hasn't happened since starting cymbalta)
*Get very dizzy, particularly when giving my children baths and I stand up. I often have to brace myself on the counter and keep my head down to regain composure
*Shooting foot/leg pain in the morning particularly, sometimes after sitting for long periods. It usually would decrease in severity after a few steps, but for the first few steps, I would have to brace myself on the bed or desk etc. This same pain would take place when I step certain ways (backwards out of the car) (again, decreased with Cymbalta)
*Severe stabbing/sharp pain above my right leg. I had thought it was an ovary problem, but that has been ruled out, I mean, doubled over in pain sharp, but doesn't last long.
*Headaches, always headaches
*right arm has decreased strength. I am often times not able to open things when I am "flaring" water bottle? forget about it. I can't open anything with a cap when it is bad.
*some swelling around my ankles when in a lot of pain
*I have lost vision in one eye, but only once. I also have seen some floaters, but this is not often, pretty rare.
Anyway, that is all I can think of currently. Any thoughts/suggestions etc I appreciate it.

Hi there. You certainly have a lot going on. You have a lot of symptoms that might be MS. Those same symptoms could be caused by many other problems. You also have symptoms that are not typical for MS. Joint pain (ankles, knees etc) isn't caused by MS. Neither is joint swelling.

If you sent have insurance coverage for an MRI, then I'd wait a bit. You might ask about evoked potentials. I don't know the cost, but perhaps cheaper? Evoked potentials is a test of the central nervous system. It is often used to diagnose MS.

You are correct that having any other health issues will complicate a diagnosis of MS. It is a difficult disease to diagnose. Some people go years before getting one.

What did your doctor say about the loss of vision in your eye? How long did it take to come back?