8 day period ?

Emily

I started bc at the start of my period but had to stop it after 6 days because of nausea and chest pain. My period was kinda almost gone on the 5th day, it only showed up when i used the bathroom and that’s how it’s been for the past three days. My period is almost always 6 days, with barely any blood on the 6th day. Is this just because of the pill?