Period, Two week period

So it’s been two weeks that I have been on my period and I’m getting concerned now. I’m on Birth control and I work a lot plus I have school so I ended up missing 3 days and I’m thinking I’m on my period longer because of that but now I’m not sure. I started my pills 3 days ago too. I just need help, I’m scared to go to a doctor or tell my mom. I just need help because I’m actually scared I just want it to be over