DON'T implant hair when you're 19!!
Your hairline will keep receding and you'll have this fake hair at your temples while the rest of your hair is gone. Wait until it's gone at the back. Anyway.
I've seen a few people at 6th form with receding hairlines actually, including this guy from my secondary school whose hairline started going at 14. He gels it and I've read the gel makes hair loss worse.
If it's diffuse (all over) rather than in the hairline region, then it might not be male pattern baldness.
If your hair starts falling out in the crown, then you can do a pretty convincing combover which doesn't look like a combover at all.
Chin up! My hair started falling out at 15, it's growing back now and stopped, but I know what it's like (: If yours isn't MPB then it's probably stress or something like dermatitis, which should be pretty easy to target. Grow a fringe, don't wash your hair too much, do brush it every day to get the excess hair out (it's not nice when it comes out all in one go in the shower) don't straighten it so it looks fuller...I hope it goes slowly for you (: