What could this be ?

Well I am no expert, but from what I learned from school was that regardless, if you have your period, you are not pregnant. No matter how thrown off it is. Maybe it is because your body is not used to having unprotected sex. I’m not sure. But I don’t think you’re pregnant. There are a lot of people (we don’t hear about it as much) who have unprotected sex all the time, and they don’t get pregnant. The only reason why it seems like it happens a lot is because we don’t hear about the cases of unprotected sex with no pregnancies; we only hear about the unprotected sex with pregnancies. That’s why it seems to happen a lot more. Realistically the ratio of cases of pregnancies to non pregnancies during unprotected sex are about 1:10. About the symptoms; I will bet that those symptoms are all psychological. I’ve studied psychology a lot, and more than half the time people think that they are sick, or have some sort of learning disability, they give themselves their own symptoms. You think that you are pregnant, so your body will start to look closely for the symptoms. The only reason why you will find those symptoms is because your mind created them so it could find them. For example; If you keep your head down all the time looking for dog crap, you will eventually find it. If you keep looking for symptoms in yourself, then you will eventually find them too. (p.s. even if you don’t think your pregnant, you feel like something is wrong, so once again, your mind will make it seems like something is wrong.) I hope I helped!