Helppppppp!!!!😣

Last week around thursday or friday my period ended. Then saturday my bf & i had sex w protection. (Condom) earlier this week almost everytime i ate, about an hour or 2 later i begin to feel as if i need to throw up but I can't. Then everynow & then i get cramps as if im about to start my period, yet i just ended it last week. I have lotss of cervical mucus because im ovulating at the moment idk if thats important to know. Do you ladies have any idea whats going on with me? If i was pregnant i dont think id be feeling symptoms so early. Please help 😣😣