Hiding in a dream commonly points to self-protection -- an instinct to stay small or unseen while something feels too exposed or shameful to face directly. It can reflect a real situation where you're holding back a part of yourself, waiting until it feels safer to be fully visible again.
Planets under the Sun's beams, or within twelve degrees thereof, are unfortunate, unless in the same degree with him, but when passed 12 degrees from him (existentes orientales) they are fortunate. - William Lilly (1602.-1681.)