If you do have an ear infection and/or water on the inner ear this can cause vertigo, vertigo in turn causes serve dizziness and neause. The only thing I could see were ur gear could play into these sides would be if you are having a spike in your blood pressure.
A sudden spike in blood pressure can cause vertigo like symptoms as well as blurred or tunnel like vision, ringing or pounding in the ears, a sudden stiffness in the neck and headache or migraines.

Don't know if this helps you or not.

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