Oh dear...unfortunately still an all too common misdiadgnosis for adult onset diabetes.
Check the DVLA website, but I'm pretty sure they are only interested in the insulin dependency due to the increased risk of hypos while driving rather than the T1/T2 distinction.
If you are in England do you get free prescriptions for T2? If not, you need to ask your GP for the paperwork to get that sorted.
As for the emotional side of things, hopefully the new diagnosis will help you get a handle on your BG and things will look up.