It has been awhile since I have been on this forum so have just seen your post. I wonder how your condition is going and if you have stopped having the bad dreams or have sought professional help?
Bed wetting (or nocturnal enuresis) is something that I have been living with all my life and I have done a lot of research on the topic as well as completing a health degree from Curtin University. Research shows that 1-2% of the adult population are living with primary nocturnal enuresis, or more simply, have never 'grown out of' bed wetting.
In your case, secondary nocturnal enuresis is when bed wetting occurs after being dry at night, generally dry for greater than 6 months.
In both primary and secondary enuresis there are underlying but different issues that will cause the bed wetting. In your case of secondary nocturnal enuresis, it is important to speak to your GP to rule out medical conditions such as diabetes and enlarged prostate as you have done. Other contributing factors maybe be excess caffeine or alcohol consumption, or a mental health issue such as depression or anxiety.
In any case, it is important to know that you are not alone and support is available to help you through this period. Incontinence is not and should not be an embarrassing issue, just look at the many incontinence aids and products available in chemists and supermarkets which show just how common the issue is.
Take care and all the best!