Wheezing after waking up in the middle of the night.

[Stubirds]

I have the craziest symptoms going on now.  For the past month or 2 I have been waking up in the middle of the night usually between 2-5AM and I start to wheeze about 15 minutes later.  I have to sit up or walk around and it goes away in almost exactly an hour later,then I fall back asleep and i'm totally fine.  I have no symptoms during the day.  I have none at night nor have no symptoms when I lay down to go to bed  I fall asleep just fine.  I have always been a light sleeper and always wake up in the middle of the night, but I just roll back over and fall asleep.  Now, I'll wake up, and I'm not wheezy, but when I try to fall back asleep, 15 minutes later I start to wheeze and it lasts about an hour.  I have no history of asthma.  I do have acid reflux and have been given omeperazole in the past but never have to take it.  I don't have any signs of heartburn or acid refulx when I go to bed.  Also when I wake up at night I don't have any signs of heartburn or anything  But I start to wheeze after 15 minutes upon waking up.  My laundry detergent hasn't changed.  My pillow hasn't changed.  This started happening about a month ago and it's becoming quite frequent lately, almost every night.  My doctor said to go back on the omeprazole for a month to see if it helps but if it doesn't, he's gonna send me for a chest xray.  Any thoughts?