Adding to Dejibo's advice, which is excellent: Swank diet does not preclude dairy, but you must use non-fat. The symptom of not getting the BP correctly when you stand or sit is significant, showing...what? As Dej says, showing that you are not in control of this system; One more, it is not an easy diagnosis to get a porphyria dx. It does not come out automatically with first tests, except in a few cases. The loss of automatic control of the BP is sometimes a porphyria symptom, although I (who have porph) did not show this.

Adding my prayers and hugs to others'.