starting the pill😧

Makenna
I was recently put on the pill because of very heavy periods, my usual period lasts 4 days however this month (the first month on the pill) I've had a 14 day period and now, on day 17, Im still getting light pink blood after going to the bathroom😩 are my periods meant to be this buggered after starting the pill? thank you in advance ❤️❤️