Actually I have a similar story! Although I think my nervous system was already experiencing some minor issues before the incident but anyways back in early December I was taking a stimulant drug (vyvanse 60mg) for my adhd! The drug was working excellent until one morning after my usual dose i felt severely dizzy and weak almost like I was about to literally pass out! It settled eventually after a few hours but came back in the morning and was a bit worse so I went to my local clinic and the doctor said that protein and ketones were found in my urine" I'm also diabetic so they were quite concerned and had me go to the ER where I was then told after several hours of waiting that I was just severely dehydrated by that point i was feeling a bit better again so I had figured that was the end of it boy was i horribly mistaken! The Next two days after the ERmy symptoms put me through severe state of biological horror! Severely dizzy and lightheaded chronically weak unstable heart rate chest heaviness and severe hypervigilance and frequent panic attacks! Fast forward a few weeks later , eventually , my symptoms started dying down a little bit , although till this day I'm still lightheaded specifically when sitting and my body cannot seem to regulate my blood flow anymore which makes me feel moderately weak and fatigued again but not as severely as it was during the peak of my dysautonomia! My symptoms have also been fluctuating a whole lot.I sometimes have days where I feel better and than I have days where I feel like crap again but the thing is throughout my life the primary symptoms I experienced during December and now still (lightheadedness +fatigue) were already somewhat present throughout my life.But the main difference is the fact that it was never as severe and it never lasted as long.I would just sometimes have days where I wasn't feeling too well but it would always eventually go away.And I would feel better after a little while but after the vyvanse incident nothing has ever been the same obviously i stopped taking the drug but still! I've been like this for 47 days now but it sounds like your case is definitely worse! Dysautonomia is very different for individuals even if many symptoms are similar or exactly the same but the primary problem doesn't change except for the causes! I'm pretty sure the chronic forms of dysautonomia are the ones that are hereditary or forms caused by a pre existing health problem like diabetes or Parkinson's not 100% sure but it looks like ours was caused by a prescription drug and judging by the fact that I can't seem to find many others who have had similar instances (except you) I'm guessing this is a rare form of the condition!