Hi mama! Okay, so the Depo shot is super effective talaga, pero irregular bleeding or spotting especially sa early months is pretty normal, a few of us depo users experienced that din, kaya ang dating confusing kung delayed or breakthrough bleeding lang. Since you're breastfeeding pa rin, that can also affect your cycle, so it's hard to say for sure without checking with your OB talaga, but I'd suggest making an appointment para ma-ease your mind at ma-confirm kung anong nangyayari; better safe than sorry, diba? The good news is depo is really reliable pa rin kahit may bleeding changes, but your doctor can give you the most accurate answer based sa situation mo. Rooting for you mama!