Unexplained volmiting, not pregnant.

I'm NOT pregnant.

Now that that's out of the way. Twice I have gone to work and less than thirty minutes into my shift I get sudden bouts of nausea (that result in vomiting) and literally have to run to the rest room. Out of no where my mouth begins to water and I have only seconds to get to a sink or toilet. I have no other symptoms and feel fine before and afterwards. I can't keep anything down within this time and am downing liquids just to keep hydrated. After leaving work I feel fine and don't experience any issues. No one else is getting sick and I notice that its only happening to me right as the heater or AC turns on. Is there possibly some sort of connection? Could a doctor do any sort of test to figure out the reason behind the sudden sickness? And is there any quick remedies I can do/take to soothe the nausea so that I can get through work when the bouts hit?