my period is kinda irregular but typically starts around the 15th or 16th and the 20th at the latest. instead it started on the 11th and I got cramps as normal and it felt like a normal period. However, today the 13th, the color went from a normal bright red color to a light brown and is bleeding a lot less like it does when my period is coming to an end, but it shouldn't be ending already since my period typically lasts 7 days and this will only be the third day. The last two times I had sex was the 8th using the withdrawal method and the 31st of July using a condom. could I be pregnant or am I just overthinking and worrying too much? I know this was a long post but I appreciate any comments. :)