The pill

Hi! Im taking the progestogen only pill and have been for the past two months. I only took a period on the second month of taking them and it was quite a long period (it lasted for more than a week) and it wasnt very heavy at all. I got it on the 17th of last month so should i be getting one this month too or was it just my body getting use to the pill? Because i take one everyday without any breaks. I have been sexually active too.