I was dong yard work a few minutes ago and am having trouble breathing no background of asthma or emphazima

Hello. : Hello. Although my first inclination is to associate your breathing with a seasonal allergy, i need to step back. Because there is very little information here, i want to get directly to a possible serious cause. I will list some of the symptoms of a mycocardial infarction (heart attack). Chest pain, tightness, squeezing or fullness is the most common presentation. However the pain can also present in the upper back, the upper middle abdomen, jaw, head, teeth or in the arms (left more than right). One could have nausea, vomiting or it could feel like indigestion or heartburn. Feeling short of breath, sweating and just feeling out of sorts can also occur. About a fourth of people have no significant symptoms during a heart attack. Now, if none of these things apply, then you may be having an allergic reaction to something in the environment or even a chemical used for lawn care. If you have serious difficulty breathing - please call 911.