Can Breathing In Leaking Gas Lead To Sore Throat And Headache?

Hi. Im a 20 year old male and have recently made a room in my basement, and moved in down there. I slept down there the first night, waking up tired, with a headache and sore throat but it eventually went away. I slept down there again waking up even more tired, now dizzy with a sore throat and headache again, but it has not gone away.

Could this be from moisture down there, dust, etc?

Also i just had my furnace fixed, could these be symptoms of breathing in leaking gas?