I had sex and we used a condom and she's on birth control and we also used a plan b. is there any way that she could be pregnant?

Highly unlikely : But in medicine, we never say never. It is very important to put the condom on before the penis has any contact with the vagina at all. There can be a high concentration of sperm in the pre semen clear fluid in some men. As long as you are using condoms correctly, it seems as if you have taken all proper precautions.

Pregnancy would: be highly (let's change that to extraordinarily) unlikely with this scenario.