Hello , So I Have Been Having Unprotected Sex With

Hello , so I have been having unprotected sex with my boyfriend for about 6 months now. But each time I get my period . But this month is different . For about 2 weeks now I been having this white discharge . No smell. My stomach hurts all the time. I feel like I'm going to throw up all the time . And very bad lower back pain and I'm always thirsty. I am supposed to get my period on July 28th. But I took TWO test one on July 24 and July 30.. Both said NOT PREGNANT. What's going on ?