What Causes Swollen Glands Under Ear/jaw And Throat?

I was sick about a month ago for two weeks - typical cold, sore throat, sinus infection. That passed, but I ve had persistent swollen glands the last two weeks in my neck and under the ear/jaw. The last few days, the glands in the back of my throat have swollen, too, and I have pain in my upper back, with pressure in my shoulders and even the elbows. I have VERY low-grade fever - less than a degree above where I usually am. I am due for surgery in less than a week, and my doc won t see me until Friday. i m worried this might be recurring Mono, or something else that could interfere with surgery, but no one seems to want to rush me in.