Aihhh sabar lah sis, memang scary kan when something feels off! Lepas bersalin memang boleh jadi kurang regular dulu, my friend went through the same thing after her first, and dia told me it took a few cycles before things stabilised balik, especially kalau still breastfeeding sebab hormones lagi jadi-jadi. 36 hari dengan UPT negative memang confusing, tapi tu boleh happen if your cycle is just resetting itself or hormones still recovering from pregnancy. Honestly, since you're worried dan ini first time rasa macam ni, worth going to see your doctor or clinic, they can rule out anything else and give you peace of mind. Tak perlu takut; they see this all the time postpartum. Dalam masa tunggu appointment tu, try not to stress too much (I know, easier said than done!) sebab stress itself can delay period lagi. Jangan worry, most likely your body is just taking time to find its rhythm again!
Miss S