Yea very normal your hormone levela have changed drastically so its super common
Yes, hormones are so intertwined with pregnancy that lots of things happen from too much discharge to not enough during sex, etc. I never had the issue you spoke of, I always had brown spotting after sex. :>(( Even though I knew it was normal, I would freak each and every time. I always worried. I had the increased libido going but with that as well so it wasn't a great thing. good luck