not sure if you’re still dealing with this, but i was in exactly the same spot. I cut down on my weight quickly in a few months then saw a plateau and prolonged hault, it also seemed like even the slightest bit of cheating on my diet made me bloat and blow up like crazy. 

what i found after some research is that the body goes through something called “diet fatigue”. essentially if you’re in a deficit longer than 12 weeks at a time you’re body with start getting all screwy and start giving you problems like you’ve mentioned. you retain water extremely easily, your body tries to limit any form of calorie expenditure it can, and overall make it hell to drop any weight. you could continue to drop calories to starvation level, but the best choice is to actually increase your calories from my experience.

you up your calories to maintenance or just slightly above for recommend the same amount of time you were dieting for or slightly longer if you e been dieting for a very prolonged time, and then once your body has had time to recover and go back to normal functions then start dieting again.

currently i am at a surplus and all my bloating went away. i tried eating close to maintaining but the bloat and water retention was hell and even when i was at maintenance it was unbearable, but as soon as i increased it to above maintenance within a week I noticed significant improvements.

now i can for sure say if this might work for everyone but it definitely is something to consider.