I Don't Know If I Am Pregnant Or Not. I

I don't know if i am pregnant or not. I have missed my period for almost two months now and i have white or sometimes clear discharge with no odor. I did have sex back in January with no protection but he did pull out. I have taken a total of 3 pregnancy tests ( first response early response ) however they are all negative. And i have been having some symptoms such as weight gain and sore breasts.