White discharge, and tender breasts on pills & implant

Hey!!! So I had sex awhile ago in early oct. I’ve taken 3 tests all negative. He didn’t cum in me, I’m also on the implant. I had my period Oct 22, it lasted for over a week. Some spotting. My doctor prescribed the pills. I’m about 3 weeks in I have 3 more active pills before the 4 inactive. Since then my discharge has been white, kindve milky but then other times thick and white. I’ve also noticed that my boobs have become larger and hurt a lot more. Is all of this normal? I’m not pregnant right? The 4 tests I’ve taken have come out negative. Is all of this normal with birth control. Please help!!