Can anyone answer my question?

St
Hi ladies I need some advice a little worried.. I'm 12 weeks and 2 days pregnant. My husband and I haven't had sex since I've found out we were pregnant.. I've almost been too tense to always keep up with him. I have to be really turned on.. But yesterday we had sex for the first time in a pool. I was really tight like I always am.. But I got aroused and after coming back in I peed and I wiped and I had seems to have been old blood maybe? Would that have been from him doing it a little too hard? And not from doing it that long? But I haven't bled or no cramps.