You've come a long way from your beginning weight! You're doing well, don't let the small ups and downs get to you. Also, keep in mind that our weight can fluctuate each day by quite a bit. Water has no Calories, but can contribute to our scale weight, even if it's excreted not long after. And if you eat something salty, sodium attracts water like a magnet and will contribute to that!
Since you're weighing in daily, you've gotta look at a pattern over time and not just regular daily fluctuations in weight. You're doing very well, don't let it get to you!