My gf and I did not have sex (we never have), however we did do some rubbing (she laid on her side and I laid behind her and rubbed my penis between her legs for a minute or two). I don't know for sure, but we think some precum may have got on her vagina. She was on the last day of her period and put in her birth control (Nuvaring?) a few hours later and she took a Plan B pill. What are the chances she could be pregnant? It happened about 3 weeks ago and I'm losing a lot of sleep over this. Thanks