I guess shock therapy really is the best for weight management

I've been living a bit loosely lately, not paying much attention to my weight.
But when I weighed myself over the weekend for the first time in a month, I saw that I had gained 2.5kg.
I was so shocked that I started intermittent fasting...
To be honest, before, I used to snack whenever I wasn't full,
and even when I tried to do intermittent fasting, I just couldn't stick to it.
But seeing that increased weight figure, I'm actually making it happen.
I'm strictly not eating for 16 hours...
It's like a mental version of Mounjaro.
I really hope this mindset lasts for at least two months.