Hormone level

I been having constant visits to the doctor. I'm 8 weeks and a few days and I randomly have spotting not much but some randomly. I went to the color to check my hormone level and they noticed I'm not doubling my hormone level as I should be. They said to make sure my baby is still there I need to get a sonogram done. I'm super nervous and don't know what to think 😔 has anyone else experience this and had good news at the end? What is happening?????