MY DUE DATE

I was confused on my DUE. First nag base kami sa mens. ko first week of Sep due ko then ultrasound result first week of July. Not regular since nag injectable po ako. Nag stop po ako ng JUNE then OCT - NOV 2022 lang po ako nagkaron then wala na po upon check up ng JAN positive po ako. Ano po kaya pinaka explanation dito? 😩☹️🥺#pleasehelp