Pleaseeee answer

So my bf and I had sex like 3 days ago, I made him an oral and when we were going to start doing it he put a condom first, when he was going to came he took it out and later he changed its condom and put a new one.

Am taking the birth control pills but I forgot at the beginning of the package to take one but since that everyday I take it at the same time. So is there any chance of something?

Since we made it my vagina its swollen and hurting a little, is that normal?

Do I have to worry about?

Am feeling a little nauseous and I have headache