Shortness of breath with fatigue and yawning

I have had shortness of breath when walking up hill doing other physical activity fatigue when I get really short of breath I do slot of yawning. Sitting relaxing I have to take a breath. Bending over I get short of breath. I've had pulmonary function test echo stress test blood work done and they found nothing. They have given up on what to do. So any ideas what I should do next

Gaylem, I have found relief by taking Chlorophyl, 1 tablespoon in a glass of water 4 times per day alternating with Cider vinegar 1 tablespoon in a glass of water 4 times per day, cutting down on meat and acidic foods.

i have no idea as i am realy struggling at the minute with all the same symptoms as you but i am just getting over a chest infection pneumonia and plerisy one after the other i have been off my feet for 4 weeks now i have an awful tight stomach chest and groin area also swollen ankles and tingling in my hands face and legs, i havent had any tests for COPD yet as cant do them while this ill but they are treating it as that with 2 inhalers i too dont know what to do next sorry x