I was thirty the first time I saw a cardiologist with more of less the same symptoms. It was heartburn. He gave me omeprazole.

I was fourty-seven the next time. It was a Ventricular fibrillation. The difference? I had lost consciousness.

When it is a heart problem, you will know. But regardless, it is wise to follow up. It will give you peace of mind (though not at first).

Then again, stress or lack of sleep could cause this.