Embarrassment in a dream usually centers on social fear -- a moment where you're seen doing or being something you'd rather have kept private, in front of people whose judgment matters to you. It often surfaces around real self-consciousness, a worry about how you're perceived that's bigger than the specific scenario in the dream itself.
Planets are notably made unfortunate by these accidents, viz. Combustion, Retrogradation, Peregrination, Detriment and Fall. - William Lilly (1602.-1681.)