I would not be so sure it isn't lyme disease. It's hard to diagnose. Few family physicians know enough about it. The testing is not very accurate. A negative test does not rule it out.
I have those knots in all different places on my body. Mine are most likely from lyme disease.
I'm sorry you are in so much pain. I think I would be more inclined to trust the hospital's evaluation (since they have the labs there). Did your physician or the hospital do a Western Blot to rule out Lyme? I understand that the symptoms of FMS are very similar to those of Lyme Disease. I would wish you had neither of these.
When one mentions 'knots' I think of a lump type feature...like if it were on the skull it would be something that is protruding/bulging. I haven't experienced that with FMS, although I have had times where my hair felt sensitive to the touch (which is actually the skull being sensitive).
I hope you can get some relief soon. I know it's no fun to be in intense pain. Take care please.
These knots you get do they feel like cramping of the muscle? I also have fibromyalgia,and man oh man it is not fun. Some drs say it doesnt progress or get worse over time but i would strongly disagree with them. Back to the knots. I get those alll the time. most of the time its in the backs of my legs and my shoulderblades and arms. I also dont have any insurance so i pay out of pocket to see a pain specialist. Anyways I think the knots you are experiencing are the ones i have and they are called myofascial pain syndrom. you can google it and learn more about it. Sorry to hear you are in pain, and wish i could tell you it will get better. im still in denial myself and push myself too much and end up paying for it days later because i cant move.
hope this helps....good luck