What Can I Do When Drs Are Not Willing To

what can I do when drs are not willing to listen . I have a sinus infection . I have had it for 4 months the dr I just left kept giving me inhalers nasal sprays and steroids. I told him this don't work . when I had this before I was hospitalized and put on iv antibiotics for 4 days whats wrong with drs that wont listen where can I get my own iv equipment