I just found out that Red Clover pills reduce the effectiveness of birth control pills. On the 4th week of my cycle (when I stop taking birth control pill for 7 days), I took red clover pills everyday. On the first day of my next pack, I took a Red Clover pill at 8 am, and then took a birth control pill at 12 pm. I then had unprotected sex later on that evening. How likely is it that I could be pregnant?