what do i do?

hello, i need some insight. i am 15 dpo today. i was supposed to get my period yesterday. i know it’s took quick to assume so i am not assuming. but i had swollen gums last week. my gums were bleeding when i was brushing my teeth. it only happened once. for the past few days i have been having cramps and boob pain. i don’t normally get breast pain when it comes to my period. i have also been having light pale yellow discharge. someone please help. what should i do? should i wait or test? my boobs are extra sensitive