Drunk Sex, condom slipped off

I guess I wasn’t wet enough, cause that’s the first time it happening but it came off and I guess my eyes were closed when I was riding and I heard him say “it came off” and I got up. He hadn’t cum or anything that night, we actually stopped after that. I don’t know how long it was off. This was 3 days ago. Should I be worried? My period started two days after.