Help help help

Kayla • Just a girl with questions

So I was supposed to get my period on the 15th and I didn’t so I had sex.. no condom was used but he didn’t bust in me it was on my ass lol. I don’t know if it was because I nutted and we still kept going but I feel sick like nauseous or have a heartburn and gas don’t know what’s going on HELP!? This is the first time I’ve felt sick right after sex and I was supposed to get my period and nothing yet honestly up overthinking !😩😩