I've been sick for a month. How do I get better?

Have you had a chest xray? You may have pneumonia and needed more than 1 round of antibiotics and the new cold has made it worse. You should see your doctor and see if you can be put back on the antibiotics. I had pneumonia that started that way and it took 3 months for it to completely go away. I had awful coughing fits where I was dependant on my inhaler for a month. If you don't have the money, ask friends or family for help if they can.