Effects of drugs weeks on?

[raverbaby1988]

My tapir told me this

i have taken drugs 4 times in my life and I can safely say I won't be doing it again
The first was coccaine which didn't do much for me. The second time was also coccaine and this has little affect as well.The third time I took 5 e pills ( don't ask me why) and I love the experience
The las time I took drugs I had a lump of mdma, about 4 pills AND I'm convinced I got my drink spiked. Anyways I felt really ill (was 'tripping out')for days but started to feel better.
However 3 weeks on I do not feel right and can't sleep. I feel really miserable and keep having cold sweats and my heart races. Similar symptoms to when I last took drugs. I don't understand this as I thought the drugs would have been out of my system???Is it possible that because of the large doses (stupid) that I'm still feeling the effects 3 weeks on? I feel crap!