Talk to Gynecologist on Pregnancy Test Confusion

Aoa dr. This is my sister report Usko 12 may ko periods ane the bt aye 17 ko check kia to wo report positive ai 18 ko usko shadeed bleeding start hogai n dr ne kaha uska miscarriage hogaya 2 din bd hcg beta kra k ayen wo aj gai thi test k liye ab uski ye report ai hai.is she pregnant yet or not??