I got severe retinopathy after 20 years of poor control, also two pregnancies which did not help. It took a few years to settle down (but this was probably affected by the pregnancies) and I had alot of laser and a vitrectomy but fingers crossed its all settled down now my consultant thinks I'm unlikely to have further troubles.
I too was petrified of losing my driving license but I still have a visual field just have to do the field test every 3 years.
It is worrying but it is unusual to lose your sight from retinopathy now. Can you insist on seeing the same consultant every time?