I would definitely go and get a repeat. The only way to tell for sure if everything is okay is to make sure your levels are doubling every 2-3 days. Everyone is a little different when it comes to HCG levels. I was always on the lower end and I am now 24 weeks and everything is fine and some are on the higher end and are fine. The important thing is that it continues to double. I would think your doc would have done a repeat. You can't tell too much off of one test. Also, that level would fall somewhere around the 6th week. You could have ovulated a little later than you think. Are you going to get an u/s on the 8th?
HCG levels vary greatly from woman to woman. You could also not be as far as you think. You should request a follow-up blood test to make sure the number is going up. I got my info from
http://www.ohiorepromed.com/hcg_levels.htm
I don't want to get your hopes down, but here is what I know. My level at 7 weeks during my last pregnancy which ended with d&c after missed miscarriage was 47,000. My levels this pregnancy started like:
9dpo=16
11dpo=75
15dpo=381.9
Beyond that date I'm not sure what it is since they haven't continues to test, but I am now 10w4d.
Are you sure that you didn't ovulate late?
I am 7w5d with LMP 11/7/07 and had a hCG on 12/31/07 that was 34,000 which the doctor said was normal range. Hope this helps since our dates are so similar.