Body fluctuations help

If you've actually been losing at 2 pounds or more per week, that is very aggressively fast for your relatively light body weight, unless you are very much shorter than merely petite within the normal adult female height range.

Not only does that increase health risks, and have the potential to trigger things like hair thinning a few weeks down the road, it creates physical stress on your body. Stress increases cortisol, and cortisol can increase water retention, masking fat loss on the body weight scale.

That's an oversimplification, but here's a more detailed article on dieting, cortisol, and possibly high exercise/activity, to introduce which I'll start with a quote from the article:

". . . They throw in a lot of intense exercise, try to cut calories very hard (and this often backfires if disinhibition is high; when these folks break they break) and cortisol levels go through the roof. That often causes cortisol mediated water retention . . . . Weight and fat loss appear to have stopped or at least slowed significantly. This is compounded even further in female dieters due to the vagaries of their menstrual cycle where water balance is changing enormously week to week anyhow. And invariably, this type of psychology responds to the stall by going even harder. They attempt to cut calories harder, they start doing more activity. The cycle continues and gets worse. "

https://bodyrecomposition.com/research/dietary-restraint-cortisol-levels

There's also a good thread here about the vagaries of scale weight, and why it bounces up and down by multiple pounds day to day, or even week to week, even when gradual fat loss is actually taking place. Be sure to read the article linked in the first post:

https://community.myfitnesspal.com/en/discussion/10683010/the-weird-and-highly-annoying-world-of-scale-fluctuations/p1

When losing fat steadily at 2 pounds a week, that's only around 4.5 ounces of fat loss daily, i.e., quarter of a pound. Our bodies can be 60%+ water, and that water can shift by multiple pounds within a day, or across surprisingly many days. Another thing that matters is how much food waste we have in our digestive tract on the way to the exit, which also can easily vary by more than that 4.5 ounces daily. Those things play peek-a-boo on the scale with fat loss, and they win.

I'd also note that if losing weight too aggressively fast, more than a minimum of that weight lost can be useful, attractive muscle, because our bodies can only metabolize a certain amount of stored fat daily per pound of fat we have on our body. Less body fat - i.e. not very overweight - means it's better to lose weight slower, for that and other reasons.

I hope you'll revise your plans and routine, if the 2+ pound weekly loss trend is accurate in your recent past.

Best wishes, sincerely.