I agree, I would wait for the follow up u/s until worrying. Your early, and if you had miscarried not long ago, it's very possible your dates are off. Good luck to you!
I agree that 5 weeks can be too early for a lot of people to see anything on an ultrasound. Did your doctor tell you to come back for a second ultrasound in a week to ten days?
it is common to not be able to see anyhting on a 5 week u/s. sometimes its just too early. I would get another u/s done in a week. Your numbers are looking great!!
Oh, excuse me, I mis-read your dates. You miscarried in May, and then in June you had positive tests that kept going up and up, right? Did you have a test between May 9 and June 10 that said your levels were way down?
If your tests kept going up and up and up, why do you think you miscarried?