two days before my last period my boyfriend and i had sex without using any contraceptives. About 1 1/2 - 2 weeks later i've been experiencing an increased amount of vaginal discharge. It sometimes feels like i wet my pants or like a light period flow. my boyfriend has been tested negative for std's and he's the only one i've been with. The discharge is clear,odorless, and no itching. what could have brought this onset of increased vaginal discharge? could it possibly be an early sign of pregnancy?