Hi, I had protected sex sept. 12th. I had my periods up until now. I am 2 weeks late, feel fat but that might just be because I had to stop excersising because I hurt my foot. Which could be another cause of it being late. I have always been like clockwork with my period, the latest I have ever been is 3 days. Another factor could be exams&stress over that and money. I have two jobs&I'm a full time student, barely time for anything. I took two pregnancy tests. The first was a week&a half after my period should have started, the second was two mornings later. Both came out negative completely. I also stopped taking diet pills recently because they weren't helping me lose weight. Anyone think I could be pregnant?