Would Propane be considered a noxious fume?

Ever since my father had lit his propane heater I have been getting hiccups. The night he turned it on, the propane made me very sleepy, light headed, dizzy, and nauseous. I did not sleep in my room that night. The next day, I go to my boyfriend's grandmother's house with him and I find out she's been using her propane fireplace. I cannot seem to get rid of the hiccups. I don't drink too fast, nor eat too fast. Would it be the propane that is giving me the hiccups?