Have I turned the corner?

Yesterday I was down to 209.5 What the hell happened? Have I turned the proverbial corner? My victory was short lived. Today I'm back up to 212. I don't know how the hell that happened. I eat shrimp for lunch and salad for dinner and I gain 2.5 lbs. I hate my metabolism. I really do. So today I ate an egg white omelet and we'll see what tomorrow looks like. I'll probably be back up to 216. Shoot me now.