Don't cut your PCT short. It's not worth it...you might as well go 3 or 4 weeks...if I were you, I would go four. If you do two weeks, it might be too short. If you go four weeks, then you shouldn't have to worry. I would do it just for peace of mind...there is absolutely no reason to take a minimalistic approach to PCT.

I hate arm days personally. I would move traps and biceps to your back day. Then do triceps on your shoulder day or chest day. And make Day 5 a leg day. Let me know what your thoughts are on this.

EDIT: WHOA, did not notice you're 19. Stay away from that stuff. I agree 100% with dieselrock. Don't mess up your body...you're too young. And you have tons of room to improve naturally. You would be cheating yourself if you did a cycle right now.