PLEASE HELP!!!

Okay, so I started the nuvaring 10 days ago. Doctor said use back up contraceptive for 2 weeks. The nuvaring has a 10% fail rate. I am 7 weeks postpartum. Last weekend my husband and I had sex (with a condom) and it hurt a lot. I’ve never reacted well to condoms. Tonight we had sex again. This time without a condom to see if it helped. Well it did. He knew he was supposed to pull out but he didn’t. How high do you think the chances are I could het pregnant?.. I know you’re not doctors and I know ultimately I need to just wait to test, but I need some answers now to hold me over...