Have not tried anything (still having Chemo) bit wondering how.long has it been since Chemo for you?
Is there a chance that it is relatively recent as it couldntake months for it to recover properly (or so I have been told)
Also worthwhile speaking to an endocrinologist first to see if there is a reason for it - could be that your system has not recovered and maybe they can help work out why it is not growing as it did before...
I am just doubtfull that hair loss solutions designed for men would work for women...
All the best
Jel.