HCG levels

Alesha • Happily Married SAHM

I'm about 8w 4d pregnant according to lmp and my hcg levels are 45,000 as of Friday Sept 1st. I originally had an ultrasound sceduled for Sept 12 but now after the results of the hcg levels my Dr wants me to go in sooner (in 2 days) to get an ultrasound. Is she just being cautious cus of my last miscarrage or are my levels too low?? I'm scared of losing another one and I just need some reassurance that it's gonna be ok I guess. Should I be worried??