<<Disclaimer: Verify this information before applying it to your situation.>>

I have received 14 responses to my query.

I thank you all.

The concensus is:  not rely on tests, they are often errroneous.

If she was feeling good GF, Why not stay GF.

One said the Dr. should have done the biopsy in the beginning.

A few said the negative results are quite often erroneous, but not the
other way around.

Many thanks again,
Mireille.