I have stalled with 27% of my body weight lost but still two stone to go. I have moved much slower through the doses than you, OP, as for a long time I couldn't tolerate 5mg without terrible D&V. I lost five stone taking less than 5mg for a year. I was pretty pleased from a financial pov not to be moving up, I have to say!
However, since the summer I have only lost five more pounds and gained two over Christmas that simply will not shift. I went to 5mg in November with no side effects but no loss either, and am now on 7.5mg. I am both hungry and terribly nauseous (reminds me of morning sickness) but have a bit more energy and focus again - this drained away as the lower doses became less effective and I was feeling more sluggish with a major afternoon slump every day. I still am seeing no movement on the scales. I have reduced portion sizes again - these had been creeping up but now I am having more suppression and able to cut those back down.
I have a personal trainer and do Pilates as well as strength training, also daily walks but if I am honest I have been much more sedentary in these dark and rainy December/January weeks. I have hit diet fatigue and cannot be bothered to think of tasty, healthy meals so I'm rotating the same boring foods and that means I'm much more likely to feel snackish. I am so much better in the warmer months making interesting salads, but when it's so cold I really lean towards stodgier carbs.
For me, I really do think the time of year is playing a major role but I am consoling myself on two levels. Firstly, I expect to be on these meds for life so I am not in a rush to lose all the weight as fast as possible and come off them. Secondly, in my former life, the idea that I'd only gain 2lbs over Christmas and then maintain through January rather than continuing to put weight on would be impossible to imagine. It's frustrating to find myself in maintenance when I'm not particularly close to goal, but it's much better than being five stone heavier and still gaining. If I can hold steady now, I know the weight will start moving again. I may gradually increase up to 10mg but I am cautious due to my history of side effects and the nausea I'm currently experiencing.
Psychologically, I also feel this huge relief that I'm under a BMI of 30. I started with a BMI of 42! I am still at 29, but it does feel like a bit of breathing space nonetheless.
I have major surgery scheduled later in the year, and am worried how much I may regain while out of action afterwards as I recover, so my goal is to build strength and muscle to whatever degree I can before then. But I fully expect this to be a lifelong journey and there will be bumps and stalls along the way.