My period ended Saturday. I had unprotected Sex on Monday, which caused the left over blood still in my uterus, to come down. Now I’m experiencing dryness on the labia minora and majora, dry to the point where it gets a little itchy... do i have something to be worried about?? Also how do I prevent this from happening? Because the same happens with condoms as well.

Side note: person I had sex with was tested and all results came back clean before we had sex, also I am clean.