Well, first and foremost, CONGRATULATIONS on your outstanding weight loss, and getting on stage! DAMN! That’s wonderful, good for you man.
These are just my thoughts, coach Thibs may have other input. IMO you should do whatever you were doing when you got to 206, you do NOT want to have crazy manipulations to make weight. Stop the metformin and whatever else you added and go back to what you were doing.
You look OUTSTANDING dude, especially considering you’ve lost so much weight. Are you competing in bodybuilding or physique? Either way, while you do look awesome and lean, just being completely honest to hopefully set you up for a successful showing, I do not think you’re lean enough to do a whole peak week protocol. As you’ve seen from your metformin, changing ANYTHING towards the end can totally wreck your physique. I’d recommend going back to what you were doing when you were at 206.
IMO I’d do a moderate carb load starting 5 days out, maybe get a good bump of carbs on day 1, see how you’re looking, and back off accordingly. If you’re looking full and tight, keep yourself there and don’t add more carbs, otherwise you might start looking soft. Keep water intake consistent every day, and don’t mess with diuretics. Again, throwing in last minute changes, especially without the aid of a coach, will probably not end well.
If you’re 5 days out and still not at your weight, you may need to do low carbs until weigh ins to decrease water and glycogen weight, then start carb loading as soon as weigh ins are done.
I highly recommend seeking out a coach in the future!