HELP!!

Heather

Hey Ladies, i need some help. This may be a stupid question or even one i SHOULD know the answer to but I'm stumped. So aunt flow started 4days ago yesterday. i had unprotected intercourse yesterday. Here's the weird thing,i was super heavy even during intercourse(we aren't grossed out by it) anywho. well after, my period stopped cold turkey i mean no blood,no spotting nothing and about 2hrs later felt extremely nauseous. Could i be Pregnant? Is that even possible? My oldest and only is 7 and i didn't know i was pregnant till i was 24weeks. Thanks in advance 💜