Confused ?

Hey ladies,

So last month before my period I was spotting for 4 days before my period. Took a pregnancy test, negative. And then I got my period on the 5th day. That lasted about 5 days. Today, while after having sex with my boyfriend I saw brown discharge after “cleaning up”. I did have some cramps today. But this has never happened on the 5 years I’ve been on the same birth control. Any ideas what could be going on? I have to wait till the morning to call my doctor. I’m not supposed to get my period until August 8th...