Pos HPT at 3 weeks - too soon?

[Sanchez]

Hi all

I have been MIA from BB for such a long time but wanted to ask advice.

I had a bad cramp on my L) side 3 days ago and was concerned i may have ectopic so took a prg test which came back very definite positive. (cramps have subsided)

I did read something about the chance of having false positives are common around this early time.

Has anybody done a HPT at 3 weeks and pregnancy was successful?

I am just soooo surprised as i thought the hormone levels wouldn't at all be high enough!

Many thanks
Sanchez