Palpitations and shortness of breath when lie on back??

I've been suffering from palpitations since 16 weeks or so. Driving me mad and then I worry from them which makes my anxiety one on 😂😂 I have to laugh or I would cry as I know worrying makes things worse. I've been referrefld to a cardiologist so doing all the right things just in case but interested in your stories or odd symptoms.

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