I have been taking birth control for 2 months and it has made my period very irregular. The first month, my period lasted 19 days. I asked the nurse at my normal gynecologist and she said the extra bleeding was break through bleeding caused by my body's adjustment to birth control. The second month my period lasted 3 days, stopped for about a week then started again for 10 days. After those 10 days random blood has been on the toilet paper after I use the bathroom. Today there was a dark brown discharge when I went to the restroom. I have been sexually active during these two months and have used condoms every time. I do not understand what is happening