Thanks for choosing health care magic for posting your query.
I have gone through your question in detail and I can understand what you are going through.
It doesnt appear to be meds. Probably its the sickness that is causing these symptoms. If there are so frequent infections then it would be advisable to get a ENT consultation to look for the tonsils and adenoids
Regarding the headache it is sinusitis
most probably and will require steam inhalation and warm saline gargles when required.
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
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Wish you good health,
Dr. Srikanth Reddy M.D.