You're thinking too much into it. You're dwelling too much on the "what if"s. "What if I'd been drugged?" You're not dead. So, it shouldn't be that much of a big deal anymore. You're causing your own paranoia, you're own delusions on whether or not you will become mentally ill.

You're BECOMING mentally ill because you're worrying too much about becoming mentally ill.

Stop focusing so much on something as insignificant as, "Was I drugged?" and focus on the big picture. Life.

Cheers, man. Hope you get better. :thumbsup: