I am glad you are deciding to go to the doctor. I know how much anxiety just thinking something is seriously wrong with you can cause, which then increases your anxiety, etc. It is a vicious cycle. I think you will feel better after getting a professional opinion.
As for MDMA, MDA and entheogenic vs. hallucinogenic effects, I used to take both way, way too much over the course of about 2 years somewhere around 20 years ago. I would use it generally 2 - 5 times a week (and yes this is way, way overboard and asking for trouble but I have always had an addictive and obsessive personality). I got to know these overdose and magic-less effects pretty well, sadly. Keep in mind that this is all anecdotal but it was something that my close friends who were also using in similar patterns also agreed they felt. Probably the best way I could differentiate between MDMA and MDA in regular doses was that MDMA at peak effect seemed to make everything become sort of fuzzy and my eyes would begin to feel tighter to the point where they would feel like they drifting and crossing (nystagmus). But I could always focus them. At these types of doses I would never see anything that wasn't there. Colors would just be affected and things would seem to kind of glow or appear fuzzy. MDA on the other hand would cause extremely intense nystagmus with very odd fully-formed visual hallucinations. It would seem like *eyes wiggle wiggle wiggle STOP* friend is holding a kitten *eyes wiggle wiggle wiggle STOP* friend is holding a shoe *eyes wiggle wiggle wiggle STOP* friend is actually holding nothing. I never got this effect from any level of MDMA and I believe things like this that my friends dubbed "magic tricks" were the typical profile of MDA hallucinations. In most circumstances these would be quite frightening but of course you are so out of your gourd it just doesn't phase you in that way.
Now after heavy use that blew the magic completely away, we would find ourselves continuously redosing to try to get it back (a strategy that has about a 0% chance of working I found) the two both headed in a similar direction but diverged a bit again on intensity and exact effects. At high, hallucinogenic doses of MDMA I would feel an intense depersonalized feeling with intense color blending and warping of surroundings. However, these distortions tended to be mostly static. You could stare at them and they would not move in any way. I would sometimes begin to see very mild tracers on fast moving, brightly-colored objects. At similar doses of MDA, I would have the same feeling, but the visual distortions would move, melt and wave in a more LSD-like manner. I would also see much longer, more LSD-like tracers on moving objects. Also the visual "magic trick" hallucinations would persist but in a different way. I usually found that nystagmus would either stop or level out on hallucinogenic doses. Rather if I quickly turned my head I may see something that wasn't there for a moment. I would also see strong patterns on blank surfaces that I would not see typically with MDMA.
Okay sorry I kind of went off on a tangent but I have never really stopped and tried to quantify and compare these experiences and this just got my mind going. I suppose probably the more interesting thing to you is what kind of after-effects I experienced after this level of usage. I will say I always felt 20x worse after high doses of MDA than MDMA. I would usually tend to recover within a week or two after heavy MDMA usage but sometimes it could take months to really get fully back after a high dose MDA binge. I haven't used any methylendioxy- drugs in years but I have heard that MDA has gotten extremely rare as most users tend to believe that the visual effects even at low, magical doses are an indicator of impurity of traditional psychedelics. But I am sure it is still out there. MDA is significantly faster and easier to produce than MDMA.
If I had to take a guess (and my guess is of course blown away by a doctor actually working with you), I would believe you took an overly high dose of possible MDA. Although I cannot say it is common but my experience is that there can be terrible side effects for a long period of time after an overdose of MDA. It is neurotoxic after all. But again, go by what the doctor says. I have little-to-no-experience with the research chemicals that often get passed around as "molly" these days (a few of the spacier ones can even substitute for MDMA in home test kit usage).
So be on the safe side and definitely go to the doctor soon. Best of luck and respond back with what they say if you would like to!