Depressed. Disappointed. Help.

Megan • Married💎Olivia 4/1/17• Baby #2 due in April•metformin.🌻
5 weeks 5 days pregnant. Positive confirmed urine and blood. Today I had some cramping and bleeding. I came to the er they couldn't see anything on the ultrasound. My cervix was closed he did see blood but he said it doesn't mean I'm miscarrying. My blood test levels are 399 which he said was low. This is more then likely a miscarriage isn't it?