Okay, sausages and/or hot dogs have been known to make people retain water. Edited to add also bacon (I think that's what a rasher is, right?)

Is makerel a salty fish? (I'm not sure)

Gravy? Made with what? Flour will up your carbs.

I also lost weight initially, and am playing yo-yo with two to four pounds!!

I'm not trying to pick on you. It's just that we all sometimes eat things without really thinking of everything that goes in it. (With me being the worst!)