What should I do?

Mikayla

I am on birth control but I forgot my pill on the circled day and took it the next morning. I have been bleeding off and on since Sunday and it's like a dark red almost brown color. I'm not supposed to start my period until the 26th. I have had sex several times before and after I forget my pill and he's pulled out every time but it still makes me nervous. What should I do?