The doctor put me on a diuretic for congestive heart failure and my blood pressure keeps dropping to 80/60....I didn't take a pill today and my bp is still dropping, what can I take to raise my blood pressure....when my bp drops I get dizzy and get a horrible headache and nausea......should I take potassium pills or what? I'm miserable and I have to take these diuretics for 15 days.