im 20, and have done more in a short period of time then most of done there whole lifetime. i did the same thing you did, when i found all the fun thing the drug world had to offer, i went ballistic with it. i was the baby of the group, so i pretty much got what i wanted when i wanted it...i was 14-15, they were all like 19-23.
people told me i was getting out of control, and maybe i was. but no one knew my body better then me. i knew my limits, and was pushing them.

all ive learned is if your going to be stupid, be smart about it!! have fun and do some for me!