I had surgery on the 7th and have had the same tightness, this has been my biggest problem since the pain went away after the 3rd day except at the port. The tightness was at its worst when I would lay down and try to go to sleep. The first couple of nights it was almost a panic situation where I felt I could not get a breath. I quit eating at about 5 pm last night and only had ice chips thereafter, this helped me get to sleep. I usually feel my best in the mornings and feel good today. I am still on a clear liquid diet. I go to the Dr. tomorrow and am certianly going to ask about the tightness.