My girlfriend and I had unprotected sex two months ago. I pulled out and I doubt there was much pre ejaculatory fluids. She had her period a week after that, although this month she's 5 days late for her period and says she feels bloated and is having headaches. I searched it up and a late period can be caused by taking medication which she was. She was taking medication for a bladder infection for a week about 2 weeks ago. So my question is: is it possible for her to be pregnant even though she had her period after initially having sex but missed her period this month? We're going to get a pregnancy test tomorrow but I'm just worried as of now.