Hello,
Please look into Postural Orthostatic Tachycardia Syndrome (POTS). It is a very unheard of nervous system disorder that prevents the body from being able to properly adjust to the pull of gravity. Therefore, symptoms arise, such as: rapid heart rate upon standing, low or high blood pressure, dizziness, fainting, fatigue, sweating, anxiety-like symptoms, headaches, shortness of breath, inability to exercise, nausea, vomiting, digestion problems, etc. The symptoms are endless and vary person to person day to day. Very few doctors are familiar with this illness and often misdiagnose patients.
Please feel free to contact me if you have any questions.
Best wishes,
Brandi
I think the only feed back (advice) you can get here is to have your daughter checked by a medical doctor. The family (primary) care is a good place to start. If you don't have a regular doctor, then stop in one of the walk-in clinics, assume you have them too.