Ring your surgery this afternoon and ask for an appt. to a menopause clinic, not a gynaecologist as they don't know much more than GPs do. What advice have you been given until you are able to take HRT>
What type of breast cancer did your Mum suffer from? Did she survive treatment? Quality of Life is important.
What treatment do you get for the migraines? Did your Surgery suggest that you attend regularly to be weighed, is there a dietician attached to the Practice or local Hospital?
GPs are quick to dismiss when they aren't suffering!