Why am i getting dizzy several times a day after standing up or when i bend over i get dizzy, its hard to breathe and my heart starts beating faster. ?

Many possibilites: Anemia, dehydration, low blood pressure, instability of the autonomic nervous system to cite a few of the many possibilities. Your description warrants urgent medical attention. Please see your doctor tonight or go to the ER.

Please see acute care,COVID 19 screening test recommended. If you have had COVID 19, a Cardiology evaluation may provide additional information. There are multiple conditions which cause these symptoms, including cardiac disease, pulmonary disease and infections. Stay well hydrated and avoid smoke exposure.