you cant get pregnant by oral sex .. but there is always a chance of pregnancy when using condoms ect
No. You had oral sex and protected sex. Although, the only TRUE way to be sure you can't get pregnant is to abstain. But overall, I'd say you are fine. I will say this, and no judgement but make sure you put careful thought into giving your body away to guys. hooking up with random guys at parties is a hard life and leaves internal scars on us down the road. good luck