Can you get random pressure in your head?

I've been having random pressure in my head.

It feels like someone is pushing down hard on my head then letting go.

And if I've been sitting down for a while, it feels like I'm walking on pins.

I can't get into my doctor till next Wednesday.

I've noticed this over the last week.

Is this worth going to the emergency doctor?

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Sorry, this has gone into wrong topic category. Don't know why it won't change over.
Can you get random pressure in your head?
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