I know what you mean, I am 5'4" and it just started to happen. One day your clothes fit, the next day they don't. Okay, what was I doing wrong. Not eating correctly. I found a program that has you eat every 3-4 hours, small meals or snacks. Guess what -- it's working for me. I also exercise, but I don't go to the gym everyday. I just walk. I'm even putting a smile on my face now and my clothes are starting to fit again.