What's the chance that I'm pregnant?

My period is late... It's sometimes a little late or a little early so I didn't think much of it but it's been almost been a week. Last time I had unprotected sex was around 2 weeks ago. I've been sick for a few days, unable to keep my food down, dizzy, easily exhausted despite doing the same routine.
What do you think are the chances?
What's the chance that I'm pregnant?
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