Hi there, I have had BGs similar to the ones you report and I did have symptoms like that. As my BGs have stabilized I am feeling much better.
If your husband would be interested he should consider signing up to the forum too. I think once you make some simple changes to the foods you eat as a family, you will probably all feel better for it.
Driving safety is key for anyone on Glic or other meds that can cause hypos. I hope the GP immediately arranges for a diabetic specialist nurse to see your husband (and ideally, you with him) so he knows how to meet his responsibilities as a driver and esp. as a commercial driver by using a meter and taking it with him every time he drives. This is a mistake by the GP that could have been tragic, and the GP would have potentially been in a lot of legal trouble. He needs to give a meter to anyone on Glic and ensure they know about the risks.
If your husband can ask for a printout of his blood test results or access to his records online, then that will be better than the GP just saying this or that blood test was "fine" or "low." The actual number makes all the difference to understanding and checking that the GP isn't missing something important.
One quick question if you're comfortable (OK if not) - while sleeping, does your husband snore, toss and turn/kick, or have pauses in his breathing followed by gasping for air?