I need help ladies

Okay , so about 7 weeks ago. I had sex twice. Once on my fertile day 3 days before my ovulation day and also on my ovulation day ( May 7 & may 10) . Two weeks after that I started my period. 2 days after my period I had sex on my fertile day (May 31) . Then I had sex on June 6 ,14 & 15 . Non fertile days. I started my period on the 16 & I ended today. This time my period came a week earlier. Lately I haven't been feeling good. I constantly get dizzy. I sleep a lot. I feel tired. I can't sleep on my belly cuz it starts to feel uncomfortable & it hurts. I've been wanting to throw up for like a week now but I can't. I get mood swings once in a while. Last week I took 2 pregnancy tests on different mornings & both came out negative. I feel like I gained weight but I'm not sure if I'm pregnant. Can anyone help?