Spotting on Birth Control?

I started taking Camrese Lo just over a month ago (32 days ago to be exact). My cycles have always been roughly every 26 days and periods last about 5 days. Although I've had some recent stressors to cause longer periods and spotting. I started taking Camrese Lo and began spotting about two weeks ago, I figured that was normal and would go away. My doctor had warned me I'd still have spotting around the time of my period even though Camrese Lo causes periods to be once every 3 months instead of every month. However the spotting got heavier and turned into basically a normal period but it lasted a full week. I'm still lightly spotting. Is this normal? Should I go back to see my doctor? Anyone have any experience with Camrese Lo? Thanks!