On cd15 I began spotting. Like if I just started a very light period. I continued to keep spotting bright pink over the next couple days with very minimal cramping. Now on cd18 my breast are sore. Could this be an extremely early period? Or should I make an appointment with the doc?? Not sure what to do ladies...any advice

Btw...I’ve had my IUD in place for two years now and (knock on wood) I havent had any issues with my period. Every once in a blue it would come a few days late....but never has it come ONE week after it ended. 15 days from when it stared. That’s waaaaay too soon. That’s why I’m asking for any advice. Had this happened to any of you.