I Have Intertistial Cystitis And It Flares Up With Blood

I have intertistial cystitis and it flares up with blood pressure meds. I am also allergic to sulfa antibiotic drugs. Help very painful. Get blood in urine with blood pressure meds and abdominal pain, burning and
back pain. My Internist has tried drugs from Benazapril, Losartan, Metropolol, now on Verapimil and blood
in urine again. Last year also had several Kidney stones removed and a parathyroidectomy. Help.