Hello Doc, I'm Using Norifam Contraceptives In 3 Shots First

hello doc, i'm using norifam contraceptives in 3 shots first in january until march. i stop this month of april because my husband is leaving. my question is that, if my husband will back, when i use norifam? i dont want to get pregnant because our two child are is 2 yrs old and 11 months. they needs to care us.