Hi sis! Normal lang yan, a lot of us moms got our period within the first few months after DMPA injection, especially since it's your first time, so ang body mo pa lang nag-aadjust sa hormones niya. Pero kung concerned ka talaga or kung ang dating ng bleeding mo ay off (like super prolonged or very heavy compared sa normal mo), better check with your OB lang para sure at ma-ease your mind, kasi bawat katawan naman ay different sa response sa FP methods!