Embarrassing moment. How do I fix it?

My boyfriend and I have been having sex for awhile and yesterday we did doggy for the first time. He said that when he got close to me, he could smell me (not my vagina, my butt) and i think it may have been because i was sweaty, but i was very embarrassed and I don’t really know what to do. Is there any way i can prevent this from happening again? Help please.