Your HCG level?

Kaitlyn • Surprise! Baby number three on the way! Twin sisters who are about to both become big sisters!
What was everyone's HCG levels if/when they learned what they were? 
​At 4 weeks 5 days my HCG level was 1000. 
​Is this a good number? I have to go back in tomorrow morning (I'll be roughly 5 weeks 1 day) to retest my HCG level. It needs to be at least 1500 the dr says but I'm hoping it doubles to at least 2000! 
​Anyone know the earliest anything can be detected via vaginal ultrasound At 4wks 5 days we couldn't see anything... Is this normal?