TMI!! pregnant?

so i had my period last week but it only lasted 2 days vs the normal 7 days & was not heavy at all. the second day was just spotting.. my boobs have been soooooo sore, i get nauseous & i can’t stop eating.. i took a test last night and it was negative but later hat night after i peed, there was this pink mucus plug looking discharge on the toilet paper... can i be pregnant? what is this?