Are you having any sugar free candy, protien bars, or other things that may contain sugar alcohols? For me those mean alot of painful bloating and gas.

Also if you are having alot of processed high sodium meats such as bacon, ham, sausage, hot dogs, lunch meats and so on. Make sure to drink tons of water, as that helps fight water retention.

The fiber thing can make a difference. What you might try is cooking your veggies for a few days. Make a wilted salad where you brown the meat, then toss in the salad greens and cook until they resemble cooked spinach. This can make them easier to digest. If you are skipping on veggies completely, then it could be you aren't having enough fiber and constapation is kicking in.

Why not post a few days worth of menus on here and maybe people can see other things that could cause discomfort.