doctor doesnt want to see me right away...should i be more concerned?

i have been experiencing pressure at the back of my head, it started when walking up stairs, raising arms above head, laying on stomach...but now it has become more random, i walked about 10 metres at a steady pace and it happened. with the pressure i experience slight dizziness and distorted vision.

edit: thought if i entered question at the side it would send me to the next page to elaborate.