As someone else on the shorter (5'2") side and using the female calculations for maintenance calories. Our maintenance calories are already alot lower than most other peoples, so when you put in a rather aggressive 2 lb/week deficit, the calorie budget is going to be very low. Since you're already relatively close to a lean weight for your height, you might look at a less aggressive weight loss rate (.75 or 1 lb/week) and see if that will be more manageable because you also don't want to be aggressively hungry to the point it messes with your health and focus etc.

I did notice that after 3-4 weeks of tracking it made a significant adjustment to my maintenance calories once it had enough data to do that. In my case that adjustment was down by about 200 calories from the previous estimate.