Possible ectopic pregnancy

I went in for cramping and bleeding and they tested my HCG levels. They were in the mid 900s. They did an ultrasound as well and found a small nodule on my fallopian tube and didn’t find anything in my uterus. They want me to do a follow up ultrasound to make sure that nodule is not the baby.

They update my HCG levels today and they have risen to the 8,000s in 6days, so ik they are great.

I read that your HCG levels rise a bit slower with an ectopic. Can anyone confirm this? They are trying to make me wait a whole 3 weeks until my follow up ultrasound. I’d hate to be further traumatized with another loss.