A doctor in a dream typically represents healing paired with authority -- someone, or some part of you, trusted to know what's wrong and how to fix it. Visiting a doctor in a dream can reflect a need to address something you've been putting off, physically or emotionally, while feeling exposed in their presence often points to vulnerability around admitting you need help at all.
The first sign hath pre-eminence in signification, when there be two signs have to do with the thing. - William Lilly (1602.-1681.)