Pregnant???

An
I had my period two weeks ago. Once it ended I started taking birth control. Im not supposed to get my next period until July 7th but two days ago I started bleeding. It's not spotting blood, it's normally lighter and thinner for me, instead it's thick and dark red. I've been using this pill for a few months now. I got off two months ago to start ttc but decided to get back on when I was accepted into a college. I've been bleeding for three days now  with cramps and nausea throughout this time. I'm going to take a test today but I wanted to see if anyone had any idea what this is or maybe went through it too.