My old job was similar to body building n very stressful.was ok n then got dizzy n difficult breathing. been through ringer on test.heart.lungs.ect?

Sounds like anxiety: Sounds like you have a lot going on and a lot on your plate. I is likely you are suffering from anxiety. You should see a professional who can help you in treating your anxiety appropriately. A therapist or counselor can also help you manage and cope with stressors teaching you ways to keep your anxiety at bay. Take some time away, to yourself, relaxation techniques, medications, meditation.