Hi @gaboslastresort so sorry to hear you're going thorough this. I have been trying to get a diagnosis for years, sometimes it just takes a while to find the right dr and right tests. Have they assessed you for Myasthenia Gravis? There are a few specialized blood tests they can do. Also, 5% of MS patients have no visible lessons on MRIs, but it doesn't sound like this to me, because it started with an event. Although the anxiety may be the actual event that triggered this, not the workout, so I wouldn't rule it out. I agree with the other comment. Did you have any experimental medications or vaccines around that time? Doctors are looking the other way when people show up with strange symptoms within days of taking it, which is a sad comment on our medical system, but the stories are out there, so it's real. I also had a similar reaction to a popular antidepressant, extreme weakness in my right arm and leg wasn't able to even use my phone with my right hand. After 7 days off that, I stopped the med, and all returned to normal. Best wishes and how they figure you out. Keep fighting.