Ay, mahirap sabihin talaga kasi ang depo ay may grace period, pero kung concerned ka talaga, better mag-take ng pregnancy test or mag-consult with your OB para sure na, three days late ay pwedeng marami pang reasons (stress, irregular cycle) pero peace of mind lang talaga ang makukuha mo pag nag-check with a doctor, sis! Huwag mag-alala ng mabuti muna, pero don't wait na if may symptoms ka na, okay?