Marijuana & impotency in male erection

Hello,

I have problems with my erection. I had an uretral infection and I'm trying to cure it. Also I smoke marijuana everyday at least once for the last couple of years. Cigarette smoker too. In the last couple of months (4-6) I feel that my penis is not that hard like before. It's getting up harder and I ejaculate harder. My question is is it too late to recover myself. I stopped smoking pot and cigarettes for a couple of days. The enterococcus are gone too but I'm going to check for it again. I've read that smoking marijuana will lower my testosterone levels for long term. Nobody says how long is the long term. I need to know how will this be -1,3,10 months, 1,3,10 years? I was also wondering is taking tribulus and adequate way to deal the problem and recover my potency. Can you offer my any herbal or drug substancies so I'll get better? Thanks in advance