Thank you for that additional information.
It is hard to say exactly what is going on without examining you. But, from what you have posted, you might be having something as benign/non-health threatening as an anxiety attack, or something systemic as hormonal imbalance/early peri-menopause, undiagnosed diabetes etc, or a case of food poisoning.
It does not sound like you are having a heart attack but, of course, the best way to know what is happening would be to go to the ER for a complete evaluation.
You might try taking a couple of aspirin and laying down in a quiet room with a cool towel on your forehead to see if you feel better in 20 minutes or so.
Does this make sense to you?
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