Hey mama, first things first, please make sure your OB knows about this and you're going for regular check-ups, ha? Low-lying placenta with a short cervix and bleeding need close monitoring, kaya huwag mag-self-manage lang.
I haven't heard of someone with exactly this combo sa aming circle, but maraming moms here do have placenta concerns during pregnancy. Every case is different, kaya really important na close ka sa your doctor about what's happening. Alam mo naman, pregnancy complications can change, so frequent ultrasounds and check-ins are key.
Hoping you're in good hands with your OB, mama. Sending you strength, alam ko nakakatakot ang ganito.