Could I be pregnant

Well I had sex last week not this week passing. It made a week Monday so I'm guessing I have to wait another week to find out if I'm pregnant. Well anyway every since I had sex or whatever I been feeling sick like I be hungry and as soon as I get ready to eat I loose my appetite. And I really be hungry. I force myself to eat cause I know I'm hungry but when I bite into my food it don't taste the same. Now my breast are getting big and it hurts not a lot but it hurts. I'm guessing my stomach hurting because I keep eating hot stuff irdk. Anyway I'm probably thinking too much and it be the second week this Monday. I really hoping I am but I don't want to think about it much bc I might not but I can't help but to think about it.