Man...
Life is hard... and long.
Don't get a hair transplant right now... You are young, it will get worse. That's the truth.
Some meds can make it slow down, but, some time, it will definitly get at least a bit worse...
You don't wan't to do a HT now and, sometime in the future, get hostage of a hat or toppik and similars.
Be confident, go to the gym, make yourself feel better of somehow.
I did a hair transplant at your age and I have my regrets. You can look for some stories (awful, btw) at this forum that will make you change your mind.
In my opinion, if you want to do a HT, do it when an entire area of your scalp is "lost". Crown, front, middle, whatever... Do it when it will make a serious and permanent change in your look, not when it will be temporary (2, 3 years from now your natural hairline will suffer a bigger recession and it will be all worthless).
It sucks? Yes. It sucks. But like I said, compensate it somehow. You win a bit here, lose a bit there, but don't fuck your life.