I'm a bit worried because last week I started having watery eyes and sneezing, but no cough at that time. The sneezing and watery eyes stopped a couple of days ago, and now I've developed a cough. The thing is, it's not like a regular coughit's neither wet nor dry, and it doesnt happen all the time. My oxygen levels are usually around 98, but they've dropped to 96, 97, and 96. When I lie down, it even goes to 93, 94, and 95. Should I consider getting an X-ray? Also, I have a history of GERD problems. What do you suggest?