you should ask for a whole body M.O.T..i got one recently.I gets a letter from doc asking me to contact her as soon as poss,and was shytting me knickers LOL.
Turns out my bloods.liver,cholesterol etc were all fine and dandy,BUT i was going through the menopause !
Im on thyroxene nowadays,as i too have low blood pressure and suffer from headaches.But i feel much better im on thyroxene,as it balances me up better.175 mcg’s a day,quite a high dose.But ya know me chuck,,i never do things by halfs !