Can you get pregnant from the male wearing protection?
There is always a chance as no form of birth control is 100% effective - accept for absinence of course. If you do not want to get pregnant use a regular form of birth control such as the pill, IUD, the patch etc. and always, always, use a condom in addition to your regular birth control. Not only will a condom be added protection but it will also help prevent the transmission of STD's and/or HIV/AIDS.
If you had the appropriate protection, then it is highly unlikely that you would become pregnant. Still, you need to take ejaculation out of the equation. Just because a male does not reach full ejaculation, does not mean there was no pre-ejaculation seepage of semen. If you do not wish to become pregnant, then always use protection.