pregnant?

hello all. i’m very worried rn as i’ve been nauseous for weeks and my stomach has been hurting.

on 8/1 i kinda had sex with a guy (im a virgin it didn’t go all the way in) and i got my period the next day. my period lasted until 8/23 and my doctor had me take a pregnancy test that day because of my period being long.

the test came back negative.

is it possible i could be pregnant