Pocket - I'm 33 now but have been through some of the same. Alot of what your going through & what I learned was that it was mostly just in my mind, I'll tell you why. First, my experience with Propecia. When my doctor prescribed it to me he told me of the side affects but never mentioned erection problems. I took it for a year & a half without any issues, none. One night while looking at sites on hair transplant I found a forum that talked about hair loss issues. One of the things I noticed was that a number of guys talked about having erection problems on Propecia. (some said they had no issues either) I became a little freaked out & started to think about this. Needless to say, I took the thoughts to bed with me that night. I had those thoughts pop into my mind just before trying to have sex with the girlfriend, well guess what happened.. No erection. I was troubled, to say the least. Long story short, it happened the next night, & the next. Same thoughts, same problem. I then realized after the third time that I'd been on this medication for 18 months & never had a single issue, UNTIL I READ ABOUT IT. For me, it was all in my head, have not had issues since that realization. I know Propecia will tell you this does occur in a small amount of men. I believe alot of the guys that have this issue is because its on their mind before having sex, especially if it happens more than once or twice. For me, sex is just as mental as it is physical. If I'm thinking about having problems just before sex, well, I'm going to have problems. If I believe that all is well & I'm going to bang this girl with a rock hard erection all night, guess what happens. I went through the same thing at your age with premature ejaculation with a girl I dated. Could not last for 45 seconds, everytime. It was devastating. The next girlfriend I was terrified the first time I knew we were going to have sex. Somehow, I mustered up a bit of belief that I could last for 15 or 20 min, I had to, just had to. Guess what, I lasted for alot longer than that. So what the hell am I saying after all this. All you need is one good erection dude, believe me, once it happens, & it will happen, you'll be fine the rest of your life. Believe that you can & you will. Instead of having the bad thoughts before the act, remind yourself that your 19 years old...you could have sex for days if you wanted! (what i'd give to be 19 again!) Second, the morning wood. I lost it around 19, was out of shape & partying alot. I got myself back into good shape about 2 years ago, still go to the gym 5 days a week. Once I was back in shape, at 32, I started getting the morning wood again. I'm not going to lie & say every morning, but alot of the time. If your out of shape look into a gym. It's done wonders for me, physically & mentally. Its a great way to work off those depression thoughts too. Third, I believe the acutane you take is for acne. Had the same problem all my life, tried everything but that drug. I looked that up on the net, its got some wicked side affects. What I stumbled upon though, for me, the problem was my diet. I ate healthy but never got much protein in my diet. I started drinking protein shakes 3 times a day, mostly for the workouts I had, but noticed over time that my acne totally disappeared. Sounds funny, I know. Went out of town for three weeks not too long ago, did not eat very healthy, & some acne came back. Got back home on the regular diet, & now its gone again. Look into it when you get time.
Didn't mean to go on for so long, but I can relate.
Positive thoughts dude, your only 19, your dick will get hard no matter what!Take it from me, once you get past that first erection, you'll never look back.