my workplace is making me sick, what can I do about it?

It seems like as soon as it is not summer anymore I start sneezing and get a runny nose at work. This not just a little bit either. I can be sitting at my desk and all of sudden my nose starts running and I sneeze uncontrollably and will it stops just a suddenly. I work in a call center, I stay in the same spot all the time, not mention how hard it is to talk on the phone while sneezing and holding my nose while it is running.

This has been happening for years, but not all the time I have worked here. Last winter I went through allergy testing, I had no allergies. Last spring I had sinus surgery because the ETN Dr said one side of my sinus was full. Nothing has changed. I spray my nose saline, decongestant, and other nose sprays. I have taken Claritin, Zyrtec, Benadryl, Hydroxyzine, nothing seems to help short of quiting my job. Does my place of business have any responsibility in this?

Other people sneeze more than usual during these time, but nothing like me