Could I be pregnant?

Me and my boyfriend use the pull out method and I am not not any time of birth control. I was wondering of I could be pregnant...? I am 8 days late, been cramping with mild sharp pains on one side, back hurts, sore breast, lots of white/clear discharge, needing to use the restroom a lot and my stomach feels upset and nauseous. I have taken a home pregnancy test and it comes out negative.