missed miscarriage

Betty

so im supposed to be 8 weeks pregnant but tonight i went to ER because ive been having cramping for 3 days . they did an ultrasound and didnt see a fetal heartbeat.... they are saying a possible miscarriage so i have to wait for my OB appt on thursday if i dont pass the baby and they are doing a second ultrsound. i dont know what to do and i feel alone and scared and very depressed.