If it is a male licensed product which it probably is if you got it on the NHS, the usual advice is for women to use one tenth of the male dose.
Is there anything on the box or patient information leaflet inside regarding instructions for male use?
If you post the brand name of the product you have, someone who uses that will probably respond.
Unfortunately your GP might not know - that is sometimes the case when they select "as directed" for the dose.
Do make sure you aren't using the amount intended for a man.