As you are newly diagnosed, I would urge you not to fast until you have lowered your blood glucose levels to normal and kept them there for a while.
Just the reduction in blood glucose from whatever high it has reached can be a bit of a shock - I got lost in my own bedroom trying to walk from the door to the bed in the dark. It is called a false hypo as BG levels are usually not all that low, it is just your brain panicking at the sudden loss of the sugary bath it had been enjoying.