We had sex around 2 weeks before her expected period, which is in her fertile zone, since I didn't have condom at that time, I used pull out method and ensured that I did not finish inside her. I also peed before hand to make sure I limited the amount of sperm left from previous ejaculation.
4 days before her expected period, she started to have brown spotting continuously for 6 days in a row, with a little bit of red fresh blood on the 2nd day with little amount, then followed by brown blood again. On the 7th day (today), she completely stopped bleeding which makes me very nervous, since that can mean she missed her period and the blood can be implantation bleeding. I realized by mistakes and am very worry that she might be pregnant. Other than the brown spotting, she also said she experience a little headache and stomach ache before, which she felt better after eating stomach medicines.
What are the chances that she is pregnant? If she is not pregnant, does she have any health issues that can be concerning? Thank you.