Could my chances of pregnancy be high?

I had sex last night with a condom and when we were done and he pulled out, the condom was still inside of me but it didn’t break or anything but it was also empty?? Now when I say inside of me I mean like halfway hanging out we checked it for holes and I also didn’t feel anything but I did take a plan b just in case today . My period ended feb 29th I don’t know how to track ovulation I’m still learning so should I be concerned?