400 hcg & cant find the baby


I went to the hospital for a migraine, neck pain, & side pain. After ultrasounds and bloodwork all he could say was that I’m pregnant but they can not find the baby. Maybe because I’m too early, im going to miscarry or because the baby is growing outside of the uterus. Said my bloodwork was great & told me to come back in two days to make sure my hcg is doubling then left 🙄🙄 anyone had this happen? Tell me something because I’m driving my self crazy.