You might want to consult an Allergy specialist if you haven't done so already. It is possible to develop new allergies at any time, and since you mention summer worstening, I'd suspect a pollen allergy of some kind that may be causing or contributing to your troubles. Yes, I also agree other health issues can cause shortness of breath/wheezy feelings. Also, make sure you aren't cutting out nutrition vital to good health during your weight loss program - anemia, for example, can also cause shortness of breath very similar to asthma but can usually be corrected with proper nutrition (iron, folic acid, vitamin B12 ~ all 3 of these nutrients are needed for red blood cell formation; it is recommended that a person get these 3 nutrients tested before starting supplements, especially iron, to avoid overdose or waste $ on something not needed).
Congrats on the weight loss too :)
Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD (Lupus?), Osteoporosis, Anemia, Lymphopenia, chronic malabsorption/malnutrition, Lyme Disease (Igenex Lab IgM WesternBlot positive; & as of 7/25/08, IgM is CDC Positive!), etc.; Currently TPN-dependent.
Meds: Zofran, Vitamin B12 Shots, Heparin (to flush PICC line).