I have UNPROTECTED SEX ALL THE TIME !

Okay so i had a period November 12-17 i had sex on the 18th and was very sick that day . I was WEAK fever of 104 back killing me stomach hurting bad , a headache &NO APPETITE WHAT SO EVER ! Basically was trying to sleep all day .November 19th i woke up at like 4am and had diarrhea SOOOO BAD and i drunk an orange soda and threw it uP within 2 minutes! I was throwing up so bad but after that i was done my fever went down slowly the only thing was my appetite was off . Everything i brought to eat i couldn’t eat nearly half without want to puke ! Now my appetite has been wild but i still cant finish my food . Could i be pregnant even if i just had a period ? Could it just be a stomach virus or food poisoning bc I’ve never had any of those ?I took a test but I’m not really sure ...those will be below . Please help me