wow, sorry you're feeling so awful! Thing is drs will just dump meds into you guessing and they really usually don't help, as you see now. The virus or whatever needs to go its course and then go. If you try and suppress it, it'll freak.
That aside, what are you eating? Do NOT eat any sugar nothing with sugar in it, totally weakens the immune system. Also, no flour products or dairy products. If you eat simple, lightly steamed veggies, some brown rice, oatmeal, berries and stuff like that.
If you have a partner, have him/her put some olive oil along your spine and press with the back of a spoon up and down on the outside of your spine, NOT ON IT till it turns red, will get blood flowing. Also, while in the shower and the water is hot, rub from the chest middle outward in circular motions to loosen up phlegm.
Last year I had a bad cough and sick with no fever for nearly a month. I took no meds, just did what I suggested and it passed.
You can, if you're interested, go to an acupuncture at Turtle Island Medical Center on Yamato and Federal. They're great and helped me out many times. 4800 N Federal Hwy # 304D, Boca Raton - ###-###-####