Are you drinking enough water? It could be some sever water retention due to not having enough water and eating too many high sodium processed foods. Like mentioned before food intolerences can cause gas and bloating. Hormonal shifts can also cause bloating. If there's gas and gas pains you might try taking beano or another gas reliever. Up your water intake quite a bit, start keeping track of sodium, and like stated before keep track of foods you are eating to see if there are any food intolerences.

I know the last time I had cheese I was bloated, gassy and miserable for the entire night. I also stopped losing weight, went out of ketosis for a short time, and just felt all over miserable. (Darn those pizza toppings)