You've done a great job and from where I'm standing everything is right on track. From my own experience, I can say that taking off the "finish" pounds always takes finer adjustments. This is newer territory for you and it is perfectly normal to have to experiment to find what works best for
your body. Though shared ideas can help build a plan, you will most likely find that your best "formula" will come through trial and error.
As a smaller person (just under 5'3"), I can say that I have
never encountered a calculated formula that provided an accurate calorie count for my body. Even as a very active person (scheduled exercise and sports), I have always needed far fewer calories than what those formulas suggested. I typically need to maintain between 1100-1200 calories per day to stay at "fighting weight". I'm sure someone will want to jump in and tell me how dropping below 1200 cal will crash my metabolism. My response to that is that the supposedly "golden rule" of 1200 cal for basal metabolism does not work for all bodies. Does it really make sense that 1200 cal is the minimum for someone 5'7" (and say130lbs) and someone my size? Does it make sense for someone who is 20yo versus 60 yo (hormonal status, muscular density etc)? In addition, after they lose weight, many folks over look that they need less calories to fuel a smaller body. My experiences tell me that science can give a guide but my body's response does not always go by the book. I'm certainly not telling you that you should drop your calories or that my range is what your body needs. You may need more calories. I'm just suggesting that you may not find a book or a calculation that suits your unique needs.
You may also find that the calorie in /calorie out rule can easily be defied. For instance, if I drop my calories to the low end of range and work out very hard, my weight will not budge. But if I drop to the lower range of calories and choose more gentle workouts (walking, yoga etc), the weight comes off fairly quickly. We have to contend with stress hormones in the mix. Too much physical stress (low sleep, low calories, high physical activity) can cause the release of hormones that hinder weight loss. So how much stress is too much? It varies greatly on an individual basis (age, sleep, emotional status, health status etc). This is why so many folks report different paths to loss of those last pounds. It takes some experimentation. I agree with Spanishcurls though in that thoughts can affect your progress. You are not "stuck". You are just at that point where you need to get to know your body on a different level.
ETA: I was re-reading the other posts---- there are so many good responses and a variety of perspectives to consider. More tools in the shed