What is the percentage of getting pregnant when he didn't use a condom and your not on anything and he ejaculate inside you?

There's no set percentage. If you get your period, you're lucky as all hell. If you don't, go see your doctor, and expect new life in you.

Even if you do get your period, still, go talk to your doctor about a method that might be easier for you than relying on a guy to bring a condom. There are things like the pill, the patch, the shot, the sponge.....Mind you these won't protect you from STD's, but they'll keep you from getting pregnant if used right.