Welcome to HCM.Wheezing
and breathing difficulties appear when the airways get constricted by secretions or by swelling. This causes air to be pushed into the lungs with force that is heard as a wheeze.
Viral infections of the lung do cause wheeze but you have to rule out asthma nevertheless.
Exposure to allergens can also trigger breathing difficulties in some people.
Please get back to your doctor regarding dizziness
as that could be due to the medications you are taking for the viral fever
Your headache could be due to the sinusitis
associated with respiratory infection.