Prego again?

I have a question hopefully someone can answer. 9 yrs ago i had a tubal ligation. Found out in january i was pregnant. unfortunitly i had a miscarriage in feb and my period returned to normal in march. Aprils period was normal and according to glow i should of got my period today but i havent got it yet and i have no cramping or anything that would think i was getting it. Within the last 2 weeks i have been so tired and nauseas. I have also had heartburn. Should i wait a few more days or should i check to see if im prego again?