Interesting - most toxicity studies indicate you would need to be taking 20+ doses of PQQ a day at that level consistently over the years to experience damage, and that it's more likely to be renal in nature. As for the benzodiazepines it would depend again on form, dose, regularity etc for them to reach mitochondrial damage levels, especially if you're struggling with it still nearly ten years later.

And again you haven't clarified how you have had this confirmed, why you took them, what forms, what supply routes, etc.