Am I pregnant??

I had unprotected sex with my boyfriend, maybe 2 weeks ago and since then I have been feeling sick and throwing up. I took a pregnancy test on Monday and it came back negative but I took it before my late period. I’m supposed to get my period this Saturday. Today my mom was cooking and the smell made be throw up and a lot. I’m also gaining a lot of weight. Is it possible that I’m pregnant, even though the test came back negative? Should I take another one? Or take a blood test?