My penis is skinnier and not as thick and erections aren't as hard or can barely climax if at all is it because I've been on zoloft for almost 2 weeks or penis stretches for 2 days though?

You can't, no matter what you see, hear or read.

You cannot

It is certainly possible but much larger than average.

Boys/mens penises come in many different sizes, the odds are, a girl that really likes you for you, won't care how big or small it...

It's small (unless you haven't started puberty yet)