Sometimes when in really horny, i wanna masturbate but maybe can't or don't wanna, my penis sometimes hurts as if my erection is to big or something, is this normal?
If you have been aroused for awhile with no ejaculation, it is common to experience an ache in the groin commonly known as "blue balls"
I think it is normal, but I would recommend you to go to the doctor.
Also you can check this article http://potencyup.com/can-masturbation-cause-erectile-dysfunction/ about masturbation and some myths about it.
Anyway, if you were horny quite long time it could be a reason of our pain.