I plateaud recently and it was a combination of not eating enough calories then hitting a couple family functions/bbqs/wedding and some higher than normal caloric days.
I think my metabolism had slowed too much, then when eating a lot on a single day it messed me up. Standing on the scale I've been getting frustrated as well .Lots of gas, no bowel movements.
Your body really has to lose weight in a safe, controlled manner. I have been too aggressive and then not being careful with a binge day and what I've been eating.
I need to get back on track, eat a bit more, take a dump and HTFU. I've been riding metric centuries every saturday now and have to hit my next level of fitness. If that means anything, it's that it will pass but you have to be diligent.
PS - been taking magnesium supplements to help the bowels, the lungs and other things. Suppleents work for some, not for others. At least consider what might work for you.