Weight loss

I made a post yesterday about losing weight over the last few days. I’ve been trying to gain it back. NYE I ate so much good food and expected to have gained at least a pound back and instead I lost ANOTHER pound. I go to the dr tomorrow so I plan to talk to my OB about this even though I’m sure he will bring it up. I’ve been reading that it could be labor approaching. Has anyone ever heard of that or had that happen to them?