Late Period And Doubt Of Pregnancy

Patient: I got a depo provera shot a month ago and i am now 2days late for my period. i had un protected sex within the first 2weeks of getting the shotand now iim kind of freaking out cause my period is late and my boobs hurt, i have a more than normal discharge, im peeing all the time, my lower back hurts alot, im extremely irritable. could i be pregnant?