Honestly, I can't recall the time when I made that post, but I can say now that most of my symptoms lasted for a little over two years, with brain fog being the last to go. It definitely fluctuated in severity, with some days better than others. I even still had occasional bouts of panic and anxiety which would return, particularly when I had been stressed out at the time. In hindsight, it was only when I paid too much attention to the "brain fog" that it really got to me, and the best advice I got was to try and accept it being there, rather than try and wait for it to go. Easier said than done, but you can get yourself into a mindset of trying not to let it bother you. I also think my memory problems were in part because of the constant brain fog, due to the altered attention (as Cotcha explained).
You would have to abuse a colossal amount of MDMA over a long time to do any *significant* damage to your brain. I know many people who used (and still use) far more than I ever did with no problems whatsoever, as I'm sure you do too. What I had, and what you have still got, is psychosomatic. The very notion that you've permanently damage your brain is enough to create feelings of distress and unease.
As I've mentioned above, mine lasted a lot longer than a few months. I estimate that it lasted a little over two years, but its difficult for me to put an exact timeframe on it because its a very gradual process with lots of good and bad days. I certainly didn't wake up one morning feeling back to normal. You have to realise as well that mental illness is subjective, so there is no objective amount of time that will make you better. Time certainly is a factor in recovery, but you do have to adopt some positive attitudes as well. For me, trying my best to get on with life without letting my symptoms bother or hinder me, and not spending every waking second thinking about my symptoms, was what eventually worked. Just accept them, and they will go on their own.
Last but not least, I made the mistake early on of believing that after a certain amount of time my symptoms would go on their own, and become further distressed after each passing month, and eventually year, that they didn't. It doesn't matter how longs it been, and thinking about how its been three years will only serve to distress you. Accept the condition, and try to stop thinking thoughts such as "its been so long its never going to go", or "I must have damaged my brain", because they aren't true, and are only making you feel more spaced out (DP/DR or "brain fog").