read all these bad thngs bout teens jammin. i just turned 18 wen i jammed for my first time, i am now 20 and have cycled 4 times, and have been to the doctor several times for physicals and i am perfectly fine, natural test levels, blood pressure (lil high lol) sperm count, ect all checked out ok. should i stay off for a few years?, or is the damage already done?