Mama, if you got your Depo injection today at effective na siya right away, tapos nag-DO ka na after 2 days with withdrawal, ang risk ng pregnancy is very low, Depo is designed to be effective immediately or within a few days depending on your cycle timing, kaya ang withdrawal method on top nito ay sobrang secured na talaga. That said, para ma-ease ang mind mo completely, best talaga to check with your OB para alam mo exactly kung kelan ka fully protected based sa your cycle, a few of us moms do this kasi ang peace of mind is worth it, di ba?