Sleeping pattern changes

My little one was born August 2020 and has slept through the night since about month 2-3…that is until this May. In May she started cutting her first teeth and has not slept through the night since then. It is driving me crazy. She sleeps maybe 3-4 hours after I lay her down (she nurses to sleep) and then she is up nursing every hour and a half after that until we get up in the morning. I have tried everything i can think of to fix this or figure out why it is happening now. At first my husband and i though teething, then maybe sleep regression but we on month 3 so both of those are out the window. I have tried naps every 2.5 hours, only two naps a day, feeding oatmeal before bed, eliminating things that might be upsetting her stomach. It isn’t gas, I have tried gas drops, probiotics, teething gel, teething tablets, tylenol before bed. I’ve seen my dr about it once already and am seeing him again this week just to rule anything else out.

I was thinking tonight all of this happened the week I started taking an oral contraceptive. Has anyone heard of an oral birth control affecting the sleeping patterns of a nursing baby? I have done some internet searches but nothing came up.