thick white discharge during sex?

mariah

during sex ever since if been on bc i get a thick white mucus that i can see on my bf you know what. im on bc Aubra take it at exact time everyday. im just wondering does this happen to anybody else on bc. I've been on bc for about 10 months now, same bc and all that. help me out idk whats going on, is it just cervical mucus thinkening of what?