Lo lo estrin fe...getting nauseous

Does anyone else get nauseous on this pill too? It happens about ever 2 months when I'm on the last week with the white and brown pills and now it's been going into the first week of thr new pack. On and off nausea for over a week now...double checked with a pregnancy test every time and I'm negative. I'm ready to call my doctor to get off of it totally. I am sill nursing and do not get my period. I'm kinda thinking I'm getting nauseous because it's when I would have my period. Thanks for your input!