Dealing with Low Diastolic Pressure and Nausea

Hi there! Trying this app. I have low diastolic pressure a lot and horribly low in the mornings to where it wakes me up out of my sleep and I’m very nauseas. I feel extremely heavy and weak when this happens, standing slowly doesn’t help- standing at all makes my vision go black I’ve been told eat more salt drink more water Well, I’m still doing that. I was diagnosed with fibromyalgia and chronic fatigue syndrome, I’m just feeling like my doctor doesn’t have any better ideas than I do 🤷🏻‍♀️