On the nuclear bomb issue:

The Germans in 1945 had not gotten an actual working reactor on line. They had the beginnings of a fast fission design using graphite moderation (the same as the original University of Chicago reactor used by Enrico Fermi) but had yet to actually operate it. Their work on a nuclear bomb was based on a flawed design and the use of fusion as the means of reaction.
As the official government position on the whole research effort was one ranging from indifference to outright hostility it is unlikely that much was going to be done to advance a German nuclear bomb rapidly.
As I pointed out, it is likely that the program would only become a serious effort when the Nazi leadership was faced with their enemies, potential or actual, using such a weapon openly in tests or on them in combat.