Hi there
Yes i did have this myself just very recently. In fact, anything over 5 is considered pregnant... perhaps your friend could get a quantitative blood test done to see the exact numbers?
I had about 40 positive urine tests, one negative blood test. I kinda went overboard with the hpt's... but i couldn't get my head around it! My doc told me that my overactive thyroid voids the results of a blood test basically. But at 8 weeks started to bleed and miscarried.
I don't know if this is helpful to you, but I thought i'd share with you as it almost did my head in, so i know what your friend is experiencing.
Good luck, please let me know how it turns out for her.