possibly pregnant?

So my period is due in 5 days. My boyfriend and I messed around and he went in me numerous times during my earlier fertile days. Now I'm freaking out because my boobs are super sore, I've been extremely emotional, my back has hurt, and I've been extremely gaggy and nauseous. I have a slightly white discharge when I go to the bathroom. I don't know if I'm just stressing myself out over nothing or if there's a possibility that I could be pregnant. 😳