Period on the pill

Heather
Alright so my body is completely fucking stupid when it comes to doing normal body things. I recently went to my Obgyn to be put on the pill because I had skipped my period for roughly six months and had been on my period for going on 2 months. I started the pill I was given and my period stopped at first but now it's back. I've not had any kind of cramps or nothing, and it's a normal light to medium flow. I also can't be pregnant because my bf has had a vasectomy. I'm not worried about the pregnancy part just curious if this is normal since I'm new to the pill and my body is just trying to adjust. Thanks!