Birth control & bleeding

I started the combined pill 2 months ago and at first it was great, no changes. 2 weeks in I started spotting but it wasn’t too bad and it stopped pretty quickly. I started my period on the 23rd of December and it is now the 13th of January and I haven’t stopped bleeding. Has anyone else experienced this? I’ve got one months worth of pills left but I wanted to know if there’s anything I could do to stop this??