Hi and welcome!
I would ask for an urgent referral to your local diabetes clinic (are you in the UK?)
It is dangerous to drive while hypo, and here in the UK there are rules about minimum blood glucose levels when driving. Since this is your livelihood, you need to be taken seriously. And given the tools to test your own blood glucose as often as necessary. There are tests to determine whether people are type 1 or not. They are not infallible, but they are actually based on fact, not on some vague idea that 'we have to wait until your insulin runs out'.
Please go back to your doctor and ask for an urgent referral to someone who specialises in Diabetes, so that you can get the treatment you need. This may be further testing, a change in tablets, a move to insulin - whatever is decided it will be done by someone who knows more about diabetes than your general practitioner.
The depression should also be addressed. Many diabetics experience depression, either at diagnosis or later, and it is something that can often be treated, making a huge difference to quality of life.
I really wish you well with this. It is an uphill struggle sometimes getting our doctors to treat us seriously, and give us the referrals we need, and having depression on top of this makes it seem even more difficult.
Please come back and tell us how you get on?