my doc/ob didn't even take my HCG levels once, my HPT was enough to convince her i was pregnant and she said there was no need to test levels unless i was at risk of something going wrong (which i'm not).
I didnt have a blood test either... but I had an ultrasound last week, and they measured it at 5 weeks. They didnt see a foetal pole or yolk (it was probably too early) so they will check my HCG levels are going up.