Why does my heart pound so hard when I lie down?

I don’t want to make medical decisions for you, but have you seen a doctor? Heart palpitations and uncomfortable left side sounds like bad news heart-wise that you may wish to get checked out.

You can’t really expect us to know. You need to see a doctor.

I would also suggest you get checked out , might be high blood pressure or copd , try using more pillows that will lift you up .
I am no doctor , I’ve just had that feeling before and it went away .

There are so many different things that it could be , only a doctor would know

I had that for a long time. It turned out my blood pressure was very high. I have pills now and it doesn’t happen.

It was 138/70 a few weeks ago and 128/80 the previos quarter. Doctor did not seem concerned.

Thank you for comments. Guess I should call anyway.

This symptom is not what most people experience. Consult your physician.

I would try laying off the caffeine altogether and that includes tea and some of these ‘energy drinks’. It might also be caused by some underlying anxiety and is likely to make it difficult to get off to sleep.

Came here to post the same thing @flutherother did! BTW – same thing happened to me, dropped the caffeine especially at night and worked on my anxiety issues and the problem went away.

Could caffeine really do this?

I drink two ordinary cups of coffee when I first get up. That’s it for the day.

Nothing in the evening but one cup of no-caf herb tea. No energy drinks ever.

Same routine for years, no change.

A diet Coke like once or twice a month. Used to be much more.

Probably not the caffeine then. Do you have have any racing thoughts, or out of control thinking (can’t stop thinking about something)?