If you think it is an 'allergic reaction to environmental allergies', try an antihistamine. Ask your doctor to give you a prescript
ion for something like zrytec or allegra or whatever they are using these days. Or the pharmacist MIGHT suggest something like over-the-counter benydrl. Or maybe you are a bit deconditioned and need to build up stamina more slowly. ????? I'm just trying to throw out a few suggestions to help. Good Luck!