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In this case it is important to get checked out asap to rule out a serious cardiac condition or other problem. I know that will cause you even more loss of sleep but it is far better to err on the side of caution instead of dealing with a potentially life threatening condition that may develop.
It is important to get into an urgent care or er center to make sure it is not serious.
Once you know what you are dealing with and that it is not serious the solution may be as simple as propping yourself up with pillows but do not risk it.