Im 5weeks, pregnant, bleeding for 2days, doctor says there is a sac, yolk, but no fetal pole, cervix is closed, but sac low in uterus, miscarriage?

Threatened miscarry: While bleeding in the first trimester of pregnancy is common, it is also concerning. Because the pregnancy is so early, the pregnancy hormone (HCG) level can be followed to look for appropriate rise and then a repeat ultrasound withing 5-7days can be performed to look for appropriate development. Be sure to contact your doc for heavy bleeding with clots or severe pain. Good luck.

Unsure: It is possible that this pregnancy will fail, but at five weeks there is the very small chance that the pregnancy will progress and be normal. It would be appropriate to recheck the ultrasound exam in a week. Good luck.