Has any one gone through this and had a healthy pregnancy?

I found out I was pregnant on the 12 I should be 4 weeks . But my levels were originally 32.2 a day later they were 68.7 . My last period was Sept 15th. I’ve had several misscarrived but nothing like this . They’ve done 2 ultrasounds and can’t find a fetal pool or sac. But my levels are progressing. Has any one gone through this and had a healthy pregnancy ?