Pregnancy symptoms 12dpo

Okay so for the past three days I've been experiencing some symptoms... waves of nausea(lasting a up to 10 minutes and disappearing throughout the day), a kind of tight feeling in my stomach under my belly button, cramps similar to AF cramps, heart burn (acid reflux), and I don't really have sore breasts but sometimes I get a kind of pulsing pain in my right breast... anyone have similar symptoms, I'm taking a test tomorrow morning but might still be too early for a positive... hoping for a BFP soon, AF is due on the 28th.