Also (I did some sketchy maths for you, LOL!) I had a very high number at about 5 weeks (38000), and tested positive at 11DPO. My hcg would have been approx 2500 at that time, going by the doubling every 2 days guideline. My first test was faint, easy to see but definitely not what I'd call strong, and increased in strength over the next few days. Not sure if that'll help you at all. Fingers crossed for you.