It is possible that you sabotage yourself because you've developed a fear of success?
(Success related to fitness and reaching a body goal, not success related to work)
You have chronic health issues to deal with, you can't take stims and your schedule fluctuates.
Maybe your subconscious has decided that with those obstacles continuing to work out you will make the problems worse so it sends the message for you to stop working out in order to protect you.
I'm sure that probably sounds weird but in some cases of overweight people that I've known they start loosing weight and then start thinking about how their life will change. They start asking all the questions like: how will my friends treat me? will I keep the weight off? will I be able to do....?, will so and so still love me? they get a little scared because they suddenly realize that the life they currently have will change in big ways.
Then again, maybe you've reached a point in your life where the fitness lifestyle just isn't as important as it used to be and you're ready to move onto something else.
just my .02
I have some health issues and I can't take stims either. I can't even have caffeine. I'm not supposed to lift heavy and no HIIT so I lift lighter and do SS cardio. I listen to my body and stay consistent with my training even when my brains tells me no. It will take a lot longer for me to reach my body goals but I have to deal with what I have. BG says that sometimes you just have to work the body and wait for the brain to catch up.
In any case I hope things get better for you.