Male Baldness Info

My parents keep joking with me that i’m going to go bald, and that really scares me!
First of all, i know nothing about either of my grandfathers. I know that male patter baldness comes from the mother’s side.
My mother’s younger brother is bald (but they don’t have the same father)
I have been looking at old pictures and my hair line has always been kind of high. Just recently since starting college have I “noticed” any differences. I’m EXTREMELY stressed and i’m dealing with depression right now. I tend to freak out about things.
I’ve been sick a bunch of times this and last semester. Should I plan on going bald or should I just focus on getting myself back together over the summer?

I heard that one side effect of taking Propecia for male pattern baldness could be impotence or loss of sexual desire and I didn’t think anything of it… I started taking the drug and within one week noticed a drop in my sex drive and a few other changes down below (in size) but ignored it. Anyway, 2 weeks later and i’m still kind of un-interested and had to force myself the other day as I was so worried. Is this all in my head? Is there anybody else out there who has taken Propecia and experienced loss of libido/impotence/lack of sexual desire? I’ve done loads of reading on the net and it seems that this is a BIG problem for lots of men, and some of them…. the side effects have been irreversable. I’d rather stop taking these now if thats the case. Any advice Much appreciated