Been there, glad you found out what's up and are getting better.
This is actually somewhat common these days, for me it happened when I worked too much... without noticing it, I ended up not eating before 6pm and even then I only had a simple quick meal. Otherwise lots of coffee.
Managed to fix things, but it did take time and effort to get into better routines (and I still have moments where I fall back to old habits).
Wishing you a swift recovery and I hope you will find joy in maintaining your body from now on.