As was said, you've been around here long enough to know better, only you can answer this question, if in doubt, a comprehensive blood panel would be a good investment.
Imo, and I am NOT advocating a PCT free practice, that's freakin' stupid, but permanently shutting down an 18 year old is hard to do, chances are high that if you are hard suppressed now, you'll recover, but only a bloodtest and future responsibility is appropriate now.
Wise up, young man, what you do at 18 and 28 will most definetly affect you when you are 48 and 58, get right, move on.