Why does my heart beat faster than normal when I wake up?

I'm a 15 year old girl, I weigh like, 90 or 91 pounds, and I try to avoid unhealthy foods and the only thing I really drink is water (just giving you an idea of my health). For the past few weeks, almost every time I wake up my heart is beating really fast and hard, it's hard to breathe, and I usually feel dizzy and like I have to throw up. I'll stay feeling like that for at least 10 minutes and then it slowly goes away. Does anyone have an idea of what might be causing it?
Asked Aug 12, 2016
Because since you are sleeping your heart pumps slow because it is relax and when you wake up your heart is working and getting you ready for the day
Answered May 18, 2017
You should eat more. It will help calm your heart rate because right now because you are underweight your heart is "confused". This means it is pumping fast because it does not have enough food to get energy from.
I hope this helped- swpiggy
Answered Nov 19, 2017

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