Two weeks isn't a stall; it's a normal plateau, especially after losing a good amount of weight in a short amount of time. Your body is just adjusting to the changes.
It sounds like your calorie intake might be too low. Eating only around 1300 calories each day at 5'1" while walking 10k steps is a pretty big deficit. Your TDEE is likely around 1600-1700, which means you have a 300-400 calorie deficit on top of the sema. That's okay for a bit, but after doing that for weeks, your cortisol levels might spike, and your body will retain water, which hides any fat loss on the scale.
I suggest that you try eating at maintenance for 5-7 days. Raise your calorie intake to 1600, keep protein high, and keep walking but lower the intensity. Your body needs to know it isn't starving. After that, you might see a drop of a couple of pounds within a week of going back to a deficit.
Also, if you aren't already, add some resistance training. If you restrict calories without lifting weights, you could lose muscle mass, which will lower your metabolism. Even just doing bodyweight exercises 2-3 times per week makes a big difference.