The dr says I have low blood pressure but my bloodwork came back fine. Would anyone have any clues as to what I can do or research? I tried having orange juice first thing before I get up to see if it is a blood sugar thing but it makes no difference. first thing in the morning or at night before bed, I am very weak and faint. I have trouble with stairs and will become weak and feel like if I do not sit down to let my heart stop beating so rapidly and catch my breath, I would probably pass out. I am fine the rest of the day for stairs. I do get dizzy upon standing though due to low blood pressure.