Birth control

I got put on birth control today, and my doctor told me any birth control is okay for me to take even though I stressed baby getting my milk the last 2 appointments. I even brought it up to her my concern and she said it was fine. When I picked up my birth control pills (Loryna) it literally has a warning sticker saying do not use if breastfeeding and to consult a doctor. Should I be worried or should I just go with what my doctor said and take it and continue giving baby girl my milk? HELP!!!!!!!!!!!!!