Hello,
I have gone through your query and I can understand your concerns.
As per your description it seems that  you are probably having initial stages of 
respiratory tract infection.
No need to worry regarding this and complete cure is possible with timely treatment.
If I were your treating physician I would do the following as an initial line of management.:
1.Start a short course of antibiotics like 
amoxicillin for five to seven days.
2.You can have 
paracetamol for pain and discomfort.
3.Expectrent 
cough syrup is effective to control cough and clear secretions.
4.Antihistamines and nasal decongestants for symptomatic relief.
If symptoms persist despite all these you have to do the following:
1.A chest X-ray to  assess the severity of illness.
2.Baseline investigations like CBC(
complete blood count)
In resistant cases you may require intravenous antibiotics depending upon the severity of the illness.Your treating physician decide the treatment options based on your disease condition.
Holpe this information helpful to you.
Regards
Dr.Shinas Hussain