Okay I’m FREAKING out! Someone help?!

Okay my boyfriend and I had sex a week ago, 4 days later I was having slight brown discharge and I’m still having 3 days later. I had a sharp pain in my left breast and today I had white liquid come out when I squeezed it? Only the left. I’m on the pill and have been for two years.

I’m seriously freaking out I don’t know what to do?! Is this pregnancy?! I’m freaking out !!!!