So today me and my boyfriend re used a condom and when he finished he went inside me with the condom on. When he pulled out the condom wasn't on him anymore...come to find out it was inside me. So I pulled out the condom and examined it and he came inside the condom so I checked and made sure there was no holes in the condom by putting it under water. Long story short, should I be worried? Should I buy plan b?? HELP