let's talk about sex {baby}

i had unprotected sex new year's eve for 3 hours with one of my really close guy friends, i was on my period and we were really "LIT" as they call it. well it's been 13 days since i woke up next to him and since january 11th i have been throwing up... and this is crazy because i have NO naseau or bloating or anything. it just randomly comes and it like projectile... i know it's only 13/14 days after sex and i probabaly sound crazy but could this happen? has this happened to you or anyone you may know? i've been extremely horny and throwing up, those are my only two symptoms. i just think it's weird throwing up for the past 3 days with NO naseau... has anyone experienced this? please let me know. i'm such a worry wart!! i know this is not a definite answer but i can't test yet. so getting all the advice i can!!! thank u :-)