Yes, it is possible that your shortness of breath is due to your seasonal allergies worsening your asthma. It is important to treat your allergies to prevent your asthma from getting worse. Make sure to also have your asthma medication on hand and use it as prescribed to control your symptoms. If you are experiencing asthma symptoms more than twice a week, waking up due to asthma at least once a week, limiting physical activities due to asthma, or missing school or work because of asthma, your asthma may be poorly controlled and you should consult a healthcare professional for further advice.