HELP, pregnancy maybe

Anielies
Okay so me and my boyfriend had sex on march 17th. He didn't know if he came in me or not, so he got me a plan b and I took it about 13 hours after, then I got my period march 26th. I'm at a doctors appointment right now going to get a physical some.  Is there any way I can be pregnant? Because I know they will check me for that