When should I go see a doctor?

I'm on birth control/ yasmin...my last period was april 11th. I've had sore now for the past week and a half and it seems like they have just gotten worse over time (its not because of ovulation or before my period because when they started hurting i wasn't even close to my period). I'm now wearing a sports bra because they feel heavy. I just finished my last bc pill in the pack yesterday. When should I go see a doctor?