Beta HCG levels? What's right?!

[Amarilis]

Help - I have just heard from the EPAC that my Beta HCG levels are 3,051..

What does this mean?! I think I am 5+6 weeks, but the scan they also did shows I am 4/5 weeks?

If my last period was on the 24th Feb and I concieved on the 10th March - this would make me 6 weeks tomorrow wouldn't it?

Help (again!)

In most healthy pregnancies, Beta HCG levels go up by 66% - 100% within 48 hours in earlyish pregnancy. So one reading on its own isn't that helpful (other than to establish you definitely are pregnant) as there is a very wiide range of normal levels, presumably they are doing a further blood test to compare that 3,051 with?