Your respiratory problem will be eased with this pranayam. You will notice the benefit in 3 weeks. Do it and come back to report your progress and benefits observed.
Build up your timing gradually.If you feel tired or dizzy, stop and resume after one minute.
Anulom Vilom pranayam –
Close your right nostril with thumb and deep breath-in through left nostril
then – close left nostril with two fingers and breath-out through right nostril
then -keeping the left nostril closed deep breath-in through right nostril
then - close your right nostril with thumb and breath-out through left nostril.
This is one cycle of anulom vilom.
Repeat this cycle for 15 to 30 minutes twice a day.
Children under 15 years – do 5 to 10 minutes twice a day.
You can do this before breakfast/lunch/dinner or before bedtime or in bed.Remember to take deep long breaths into the lungs.You can do this while sitting on floor or chair or lying in bed.
Have you been diagnosed with asthma?
More information would be very helpful, but there are several reasons why asthma symptoms would be worse when the seasons change. The change in weather (temperature and humidity). Different seasons have different prevalent allergens. Also, the change in wind directtion will bring different pollens into your area.
I would recommend that you see a dr for a work up on the cause of your increased symptoms.