OK.. so I have pretty much been the same height since I was 12.. I am almost 17. Am I perhaps too old now, or is there a chance that T will help me grow taller? I have been on it for almost 4 months now and I'm really short so it had me thinking.

It depends on whether or not your growth plates have fused yet. Since we are talking about height, growth plates in the legs don't typically fuse until age 18-22. So you could maybe still get a few inches.

This brings me a little hope. Thank you.

It's hard to say for sure because there isn't really enough evidence to do adequate research on the subject, and it differs a lot depending on the person. I started T when I was 15 and I didn't grow at all because like Max said, my plates had already finished fusing. If you haven't grown since you were 12, I wouldn't get your hopes up too high, but you never know.