Even with exercise I have hard time breathing to finish a good work out waht to do even doing small walk make my heart beat to fast then I get short of breath and dizzyt?

Needs punctuation. Question needs punctuation to make it readable, but it seems to ask about small physical activities causing heart symptoms and shortness of breath. Several possibilities need to be evaluated as soon as possible. There may be some failure in the heart or lungs, or even a silent heart attack. There may be fluid around the heart or around the lungs. One's doctor or the ER can assess possible causes.