Ah normally lepas stop contraceptive injection, memang boleh ambil a few months untuk period settle balik, some of my mum friends yang dulu pakai injection cerita amalan mereka pun irregular dulu before it came back properly, so don't worry lah, it's pretty common! Tapi kalau dah 3-4 bulan lebih tak datang or ada symptoms lain, better check dengan doctor ye, just to be safe and rule out anything else. Semoga cepat normal balik!