I have just started meditating, and for the second time, I'm experiencing some wierd sensations in my head.

The feeling is quite hard to describe, but it's as if all dimensions and proportions in the space around me is shifting, and I feel like a tiny seed. Seed is the first word that comes to mind. I feel very little, and very very distant, physically, to all things around me. The walls, furniture, so on. I feel very little, not in the "Looking up at the stars and realising how small we are"-litte. But literally, physically little, and far away from everything. Doesn't sound like someting every other person experiences, and frankly I'm a bit scared. I had these sensations as a kid, during nightmares, especially during sickness and fever.