TMI TMI

So me and the guy I'm talking to had sex yesterday with a condom. When I went to readjust myself on the bed he pulled out and all this wetness hit the bed . I turned around and looked and he didn't have a condom on.  I looked down at my vagina and the rim of the condom was hanging outside of me and the sperm had leaked on the bed from the condom. I feel like the sperm didn't get inside me because the condom was far enough outside of me and the sperm fell on the bed but Should I take a plan b just to be safe ?