Dyspnea - shortness of breath.

Hello doctor, am facing shortness of breath issue due to hot weather and exertion. If outside weather is good then i don't feel any problem in breathing but if weather is hot i faced problem and its increase as day passes in morning when i wake up i feel completely ok but after doing few house hold chores this breathing problem starts and if i take 2 hours nap in cool air then also i feel fine. I have a 11 month old baby so sometime i can't sleep properly. Please advice some medication for me considering baby is on mother feed. Just for info, this problem is not related to covid i faced this issue before covid too around 2 years back i took treatment of white discharge and that time doctor given me some antibiotics i called recall name, that time this problem went away i am not sure if this was due to antibiotics. Thanks.