99fairies - Donuts are usually between 200 and 250 so they might not have even put you into a calorie surplus.

I have done a lot of walking today; over 11,000 steps according to my fitness watch.

bizi, Weighing often just makes you aware of the bounces from water weight. If you don't worry so much about the bounces if the trend is right, more data is better IMO. If you only weighed every few days and today was the day, you would think you made no progress or actually went up. Seeing it as a bounce between days, yo know that's not so.