Semen on side of penis???

Kitty
After intercourse my partner had semen running down his penis, does this mean that none of it entered me? When he ejaculated i was on top and when i got off him i noticed it. This was the first time this has happened. When we started he said i was very wet, i hope this was because i was ovulating and it was my cm that made be wet, and also hoping that when he came inside me that some of his swimmers stayed inside. I know me being on top is not a great position for TTC but it's the only position that my partner can climax. Has this happened anyone before, am i worrying over nothing and it wasn't a waste :-)