Strong odor coming from vagina.

So I am 9 weeks and 5 days pregnant and lately I have been having a really strong fishy smell that comes from my vagina during sex. My significant other says it dont bother him but it does me. He says it just our fluids mixing but I think its more then that. I shower twice a day and always use a mild soap to clean my vagina. I thought maybe it was the fact that we had sex everyday night so I stopped for a few days but its still there. I am STD free and dont know what is wrong. Anybody else have or had this problem. I dont know what to do?