Ok so me and my girlfriend had sex. We first used a condom, but then it fell off so we just didnt use one. Basically, i went in her and stuff for a few mins before i kept loosing erection (i was nervous) and did that a couple times. and maybe after like 15-20 mins we just used another condom correctly this time. I didnt even ejaculate with the condom or without, i didnt at all that night. She went to the bathroom probably a few hours ago (so we wouldnt wake my parents going to the bathroom in the night) and i did atleast 1 time maybe 2 times before we started. Is there any chance that she could be pregnant and should i be worried?