Pregnant... if not whats going on?

I had sex May 24th and 27th It was protected. but about half way through sex he had to switch condoms(it was the second time we had sex that night) Idk if it broke or if he just wanted to switch. My last period was May 9th and i have usually a 32 or 33 day cycle. Anyways, I don't want to be pregnant and I regret having sex with him. I took a test when I was a few days late and my friend told me I tested to early and that was why it was negative. but its been seven weeks from my last period. Another one of my friends said it could all be in my mind. My symptoms are. I've been Peeing a lot. I randomly go from wanting food to not wanting food. I have A LOT Queasiness (havent actually puked yet tho) Im constipated and have gas. I feel bloated and look it too. I cant stand people touching my stomach and my boobs started hurting today. What do you guys think ? Is it just in my mind or should I go see a doctor or something?