I can't stop having sweets.

I stopped at a convenience store on the way to home. I found some new sweets which I had never seen it at the shop. I really wanted to eat it.I was going to buy only one chocolate doughnut.As a result, I bought 3 of sweets. I can't stop having sweets even though I should watch the sweets.I should notice that how many calories are in these .According to the descriptions of these sweets, the calories are as follows;
A chocolate doughnut 309Kcal
A milk loaf(Chigiri pan banira choko) 367Kcal
A banana muffin 217 Kcal.
Total calories is 897 ! I am very surprised to realise how much calories are they. I should refrain from dropping in a convenience store in order to reduce my weight.