"Black Cohosh, Vitamin B6 and tablets from Holland and Barrett for hair, nails and skin."...........no comment...............anyway, none that wouldn't evoke a storm of abuse.
Right.....so far....woman, overweight, headaches, drinks a lot of water, menopausal (bet she smokes) adds up to someone who needs medical evaluation.
Two things come to mind:
a) Hypertension (Blood pressure elevated)
b) Diabetes.........mellitis or insipidus
Go to your GP.....no big deal at the moment, but if you do not seek medical help then it might develop into a big deal.