When I am outdoors and doing some moderate, manual labor my face will get red, hot and sometimes itchy, my heart will beat fast, I have shortness of breath and my body gets uncomfortably hot. I have high blood pressure that is controlled by medication. We have a family history of heart problems, but several tests in the past has indicated that I have a very healthy heart. I do have some high cholesterol. I am about 70 pounds overweight. What is going on?