I think I had a seizure at school. Could it be from drugs I did a while ago?

I should provide some backgound. Well in October 2015 I did about a gram of methlyone in a night, I assumed was MDMA (irresponsible friends convinced me to keep redosing, think they MAY have knew it was bunk. i was FUCKED and had dilated pupils in the morning). I obtained a test kit a week later and it tested positive for methlyone. Some of you may remember the post i made regarding this on another account. Then I got a hold of the real shit and did ~80mg a week after that and 100mg in a hippyflip about a month. Anyways I'm done with that shit door good, never again.

Two or three weeks ago I had what I think was my first seizure, ever. I was sitting in class waiting for the day to end so I can go home and relax. I thought I was having an unusual panic attack because I kept looking at the clock. I was trying to hold my shit together, then the bell rang. So I got up and when I was walking down the halls my teeth were chattering really fast, I had stiffened up and I was freaking out in my head, I didn't know what the fuck was happening. I ended up calming myself down and it passed in 5 minutes.

I just thought I'd post this now because I thought about it earlier and I'm curious if anyone else has experienced anything similar to this. I can't think of any other reason other than drugs that would cause this.