Not necessarily, it's possible to have a heart attack with no warning at all, eg when you're asleep.
You didn't mention chest pains which radiate up into the jaw, which is a common heart attack symptom and as far as I know dizziness and headache aren't precursor symptoms for a heart attack.
Is it normal that Im scared im gonna have a heart attack?
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Not necessarily, it's possible to have a heart attack with no warning at all, eg when you're asleep.
You didn't mention chest pains which radiate up into the jaw, which is a common heart attack symptom and as far as I know dizziness and headache aren't precursor symptoms for a heart attack.