As a respiratory therapist you might have a case of mild asthma which occurs very frequently especially during the asthma months.April ,may ,june ,sept,oct.This is due to the pollen in the air being very high.You need to see a pulmonary doctor to be placed on an inhaler to help with the shortness of breath.Since this may be a mild case at first you might have to use your inhaler every 4 hours.However in about 3 days of using the inhaler,you would see quite a difference in your breathing.You probably would be able to do many tasks becoming hardly done with no shortness of breath.As long as the sputum coming from your throat and mucous from your nose being white or clear is normal,yellow is usually a sign of a minor infection,green many times signs of pneumonia starting.Bringing up the sputum is very good versus leaving it in.You will see within a short time your breathing improving lately.The pulmonary doctor would most likely give you a pulmonary function test which has you breathing different ways into this machine that measures lung function.A percentage of 50% and higher is good lung funtion needing mild forms of inhalers.Anything 50% and lower will usually require lung function .From what I have read it looks like your case is very mild.For further reading On asthma.Go to The american lung association.org .It is an excellent asthma websites.You should try and do all your chores in early morning when pollen count is low.It increases usually in afternoon where your shortness of brath most probably would occur.Your local hospital can give you the names of pulmonary physicians.