Hi
@lolay and welcome to the club no one wants to join! I doubt you've wrecked your metabolism, just maybe sedated it a bit and I'm sure it will bounce back.
As you are only pre-diabetic you can probably get back to "normal" levels by making some changes to the way you eat. If you've piled on the pounds (as many of us have done!), reducing the amount of carbs you eat can make a significant difference. I just cut out all potatoes, bread, rice and pasta, luckily I didn't have a sweet tooth. However, I've learned from this forum that it is better to do it gradually as otherwise you may get problems with your eyesight.
If, like me, you are a carb monster, please don't worry. Once you reduce them the craving definitely lessens.
It's important not to think of it as a diet, more as a new way of eating. I'm over 2 years into my new way of eating and I really don't miss the old way now. I'm happier, more confident and certainly a great deal healthier than I was when I was diagnosed. I genuinely feel 20 years younger and it's great to be back in size 10 clothes after years of increasing through to size 20!
Any questions, just shout out. There are so many people here with masses of information and there is never such a thing as a stupid question. Best of luck
🙂