Giving a solid answer here isn't straightforward, and the details you've shared so far….
I'd like to offer something useful, but first I need a few more specifics, such as:
Are you doing any resistance training or physical activity?
What's your current body weight?
What's your daily calorie intake?
How much movement or cardio do you get each day?
A stall can happen when you're taking in too few calories, which may push your body to adjust into a kind of "we must operate as efficiently as possible and burn minimal energy" mode. Think of it as a protective response from waaayyyy back when food was hard to come by.
With the info I have, I honestly can't tell what's happening.
That said, dropping a large amount of weight, and doing it in a fairly short window, strikes me as a protective response aiming to be as energy efficient as it can. If that's what's going on, you'd need to eat more or return to your maintenance calorie level — the amount where your weight stays stable — and hold there for a week/ week and a half. That way your body can come out of this mode. Then you can go back to a plan where you're losing weight, but avoid "crash" dieting.
Crash dieting will bring about exactly the issues you're dealing with right now….
Hope this helps a little bit. If you provide more info I can give you more info about your situation!
But welcome to the platform and you're at the right place to find the info you need and ask questions!