I worked for a short time in my garden this morning in hot and humid weather. Only pulled weeds, and picked up some sticks. Since that time, I have been short of breath, chest hurts mildly, dizzy and tired and my mouth feels dry, but with an odd taste. I also have occasional tingling in my face. I lay down this afternoon and slept, but still feeling the same. I m 64, medium build, not overweight, do not smoke, no HBP. Over the last few months, when hiking, especially uphill, I notice I m prematurely out of breath and can t continue.