The bleeding started last night. Is it a miscarriage?

If there is a small amount of vaginal bleeding, there may be threatened abortion, but there may also be ectopic pregnancy, do not worry too much, you can go to the hospital to do B ultrasound, hcg, progesterone examination, clear diagnosis. If ectopic pregnancy, need to do surgery in time; if it is threatened abortion, you can first through injection progesterone, rest to carry out fetal treatment.