IM PETRIFIED.. Can someone help me.

so i had protected sex on the 8th. the condom didn’t break, my period should be coming in 8days. as of rn now i’m feeling pressure in my lower abdomen and i’m gassy af. the pressure feeling started yesterday. i’m thinking its symptoms of pms i’ve read that’s its signs of implantion... idk how this implantion stuff is possible if i had protected sex and i saw the cum in the condom. can someone tell me i’m okay or i’m highly overthinking this or something else.