Plan b

Okay. So I am in a “friends with benefits” trying to figure out our dating situation with my ex. We’re like best friends and working it out. Anyways. I was having unprotected sex with him. I was on my period (the end where your spotting/ light flow). So at the end he was on top and it was going good. Then he pulls out and like wipes off my stomach. I swear I didn’t feel him cum on me. So i was like “u finished”? He said yeah I just wiped it off. I asked where it was and he was like in the sheets. GIRLS. I didn’t feel any wet or nothin on me I swear but I’m not 💯 since I wasn’t paying to much attention to my stomach of course. He frantically wiped me off and was tripped a lil. Then the next day he tells me to go get a plan b even though he’s sure he didn’t cum in me. But he was freaking out like he did! I was on my period and I have poly cystic ovaries. So chances are like slim. But better safe. It’s just the situation has me a lil off because I feel like he did in me. Even though I didn’t see any come out when I got up. Thoughts?