Alison

Whilst I'm not sure about the low blood pressure what your symptoms say to me is a lack of potassium in your diet.

About 6 months after I started low carbing I started getting a bit dizzy when I got up at the gym. Having done some research on this forum it indicated that my potassium levels were probably low. All the water we drink washes our stores out. So I bought some extra potassium supplements from Holland and Barrett. These stopped it straight away and the problem has never recurred. If you don't want to take supplements then use LoSalt on your food. You can find it with the salt in your supermarket and it is mainly potassium chloride.

Hope you cure your symptoms soon as I know it can be quite worrying.