I Have High Blood Pressure. I Take Diovan 320mg @6am,

I have high blood pressure. I take Diovan 320mg @6am, then Clonidine hcl .1mg @ noon then again @6pm. At 11pm *I take Sectral 200 mg. My blood pressure is staying up. They tried me on a new medication Meloxicam 15mg but it dropped my pressure too fast & I went blind for a few hours (ended up in the ER) what blood pressure medicine would be best and something I would only need one of. I can't take diuretics and need my Sectral (for a prolapsed mitral valve).