Ay, ganyan talaga minsan after birth lalo na if you're breastfeeding, ang hormones mo pa lang nag-aayos, kaya spotting na, walang period, tapos PT negative pa, super confusing talaga! A few of us mums went through the same thing especially after the injectable, kaya siguro na-trigger lang ng hormones yun, but honestly, I think kailangan mo mag-consult sa OB mo para ma-check properly kung ano talaga ang nangyayari, basta bantayan mo lang ang discharge mo and kung may abnormal na meron. Don't worry ka masyado, madalas lang yan sa postpartum but better safe than sorry, especially since you just got the injection, let your doc give you peace of mind!