I have had changes in bowel habits over the last 3-4 months and presently I fee slightly bloated, I am yawning a lot , as if I need to to catch a deep breath and cannot. I can exercise without feeling winded ,and on and off I have gas pains in my chest and abdominal area. I have a history of constipation but have had much more frequent bowel movements over the last 3-4 months.