What Causes Vaginal Discharges After Intercourse?

I have white odorless thick creamy discharge and it never really began to happen to me until i became sexually active again. He has gotton checked and I got checked before, so I know I cant possibly have a disease or be pregnant seeing how I am on the pill. It doesnt have a foul smell but it smells like me, as if I was sexually aroused or something. I am on the pill, can that make it thick like that? And is there anything I can take to fix this problem. Please help.