If I had sex and he came in me and I got my period 2weeks later could I be pregnant?

It's not likely that you are pregnant. You will kind of have to wait and see if your next period comes or go to the doctor, but 2 weeks later your period came so I doubt there's much to worry about.

Get some BC or condoms before you have sex again, unprotected sex is not a good idea. Pulling out withdraw method) doesn't work either.