I don't know if I'm pregnant or my body is acting weird.

Shana • I`m 19, I live with my boyfriend in our own place. I have a baby sister and a young brother. I help them with school and get them to school. I`m a person who enjoys art and movies. I love kids.
So I had my period on the 18th of last month and ended on the 21st. Me and my boyfriend had sex since then, and everytime meats cooking the smell is horrible to me and my boyfriend says it smells fine. I'm feeling neasua at different times, I'm tired, and hungry. I'm craving Chinese a lot.