No idea how far along I am...

Emily
So I had my daughter last June and never got my periods back... took a test on Valentine's Day because I'd had a loss of appetite for about a week. Strong positive! I got blood work done yesterday and my HCG levels were 40,000. It says I could be 7-8 weeks so I'm going with 7. 
Has anyone had those levels around 7 weeks? Because I honestly still feel lost... My midwife won't do an ultrasound until 20 weeks!