Could A Sinus Infection Causes Difficulty In Breathing?

Since Friday, I have been experiencing bloating to the point I look pregnant, I m also having difficulty breathing from the pressure-like there isn t enough room-pressure on my diaphragm. My bowels have been loose, and flatulence. I also have some discomfort on my right side along the base of my rib cage in the back. I ate whole grain bread, and an apple yesterday, today I took some probiotics. I normally do not have this problem, last month I was on antibiotics & steroids for 3 weeks due to a sinus infection....could this cause this? Is ther anything I can do to get relief? Thanks!