Ay, alam ko yan ang stress ng waiting, lalo na kapag delayed ang period after injection! A few of us moms talked about this din, sometimes it takes a couple of months pa para mag-regulate ang cycle after stopping the injectable, kaya one month is still pretty normal. Since negative ka naman sa pregnancy test, I'd say best to check in with your doctor lang, maybe next week if still wala, para ma-rule out any other reasons at ma-ease your mind, okay? They might give you something to help regulate it faster or at least confirm kung normal lang yan for your body. Fingers crossed it comes soon, sis!