Possible blight ovum or too early

Brittney
I am 5 weeks and 2 days and went to the ER bc of some light spotting and cramps and ultrasound showed possible blighted ovum or I am just too early to see the baby. Has this happened to anyone and have a healthy baby? I have to get repeat hcg levels to make sure they rise because if not it confirms a miscarriage :( I am so scared.