When I was abusing mdma for a short while (2-3 weeks), with the worst period taking 0.5g of mdma in one go, the next daying doing it all over again, I started to get those twitches. I couldn't control it at all. It was really weird, I would slap stuff in my sleep and I would wake up from it because with every twitch there is some kind of brain zap involved. That can't be too good I figured. Just to say mdma can cause that stuff. After a while the zaps started to diminish (I think after about 6 months it was gone). It's been three years since that time and I never took mdma again so I can't tell you if it will come back stronger (logic says it will).
I'm assuming your e use was through the roof tho, if you still feel it after 8 months. That or you are very sensitive...