Pregnancy Test

Hey y’all, so I’m 12 DPO and have been feeling very emotional (I cried last night because we were leaving my cat home alone over night) and I had some light cramping yesterday along with nipple & breast pain. I’m projected to get my period tomorrow, so should i go buy a PT & take it or wait until tomorrow? My husband and I REALLY tried this month (we used Pre-Seed Lube and I took geritol everyday (I read in a different group that the vitamins tend to help with fertility)) and I really feel like I can’t wait... what should I do?