It's doable, but it will take discipline on your part.
You have identified the issue yourself -- "I have not been very compliant on diet/exercise/meds."
For the next couple of months, *comply*. I know it's tough, especially through the holidays, but take it one day, one activity, one meal at a time. If you're tempted by something and just can't say no, say, "Not so much." Or eat an apple instead of a piece of apple pie...a la mode.
If exercise seems too daunting, tell yourself you'll just do a little. (For me, the hardest rep is the first.) You'll be amazed that that it feels good to move. And in colder weather, movement helps me stay warm.
You *can* do it! You will, too.
Thanks for this