It has to be frustrating to be sick for so long! Really, I get that. Coughs in particular can linger a very long time and months like that. Once the air ways get irritated, they take a long time to get back to normal. Sigh. It's not easy!
Well, if the antibiotics didn't or aren't working . . . chances are you really have a virus and not something antibiotics work on. People often do have a hard time telling them apart. I doubt you have a resistant strain of bacteria that three or two antibiotics wouldn't touch. So, give it some time to see if the virus finally goes. OR, you could have a virus, then got bronchitis, then got another virus, etc. I swear this happened to me when my kids were in the elementary years. We were sick for about a solid three months one year. Very frustrating I know. Ibuprofen works for fever and pain relief, drink tea, eat popsicles, jello, hot apple juice, etc. Chicken noodle soup really does give comfort. :>) Hope you feel better soon.