Hey, i'm only 20 years old and i'm already having erection problems. I have an overactive sex drive and have been having sex since I was 15, constantly with many girlfriends over the years. And if sex isn't available I masterbate. I've been having problems getting an erection lately. It's never rock hard anymore, always sort of limp/hard. I can't drink and get an erection anymore either. I've been trying to go for periods at a time without any sexual activity in hopes it might help (which is difficult for me ), but it doesn't seem to be working...Unless I should go for a loooong period of time like months maybe? Is this normal for someone of my age, should I be looking into taking medicine like provigro or something? It could even be a mental aspect, the past couple times i did have sex i completely overanalyzed the situation, couldnt stop thinking about my situation, was nervous to even get in bed, could that maybe be an aspect? I drink alot of diet drinks, and diet, recently lost 70 pounds four or five months ago...could that be a factor?