Hey mama, I really think you should talk to your doctor about this ASAP, three months delayed plus the timing ng injection, kailangan niyang i-check properly para ma-rule out kung ano talaga ang nangyari, especially since may baby ka pa. A few of us mums have had similar worries after family planning, pero lagi napapag-usapan namin na important talaga makonsulta agad, kasi pwedeng may maraming reasons at doctor lang ang makaka-diagnose ng tama. Don't worry lang, pero go na, mas peace of mind ka after!