First of all, you are doing great. Pat yourself on the back for continuing to succeed. If you think of what you would have done last year, it will make you realize how far you really have come!

Without knowing a bit more detail, it's really hard to make a recommendation. If you post a bit of what you are eating, we may be able to help pinpoint the issue. You want to try for 70% fat and 5% carbs. I've seen folks have more success by increasing their carbs to 25-30 because it allows them to introduce a wider variety of foods to their menus.

Also, I know you mentioned you can't do a lot of exercise, but the more you can do will help. You may want to try doing some seated exercises or just some walking. The key is to gradually increase. So if you are doing 5 minutes now, then try for 6 minutes all of next week.

Good luck!