Thank you for asking your query.

The symptoms you have described are suggestive of a 'flu' or anUpper Respiratory Tract infection caused by a respiratory virus. Its difficult (and often not needed) to pinpoint which virus has caused the illness. For now I would recommend you the following :

1.Steam inhalation through mouth and nose (alternating) twice daily.

2.Tylenol / other over the counter pain killer medications for the headache two-three times a day

3.Saline gargle in warm water twice daily. 
 

Since you are having the symptoms for more that 48 hours, we need to consider the possibility of a secondary bacterial infection too. These symptoms are not suggestive of sinusitis/sinus infection, but if there is a bacterial infection, there could be a sinus infection at a later stage. Please follow the above steps and give some more time for your body to fight of the viral infection. But even after 2 more days, if the symptoms are persisting or worsening, you need to visit a Doctor. May be you will need to take some antibiotics then after consulting a Doctor.

Hope this helps. Thank you.

Please feel free to ask followup questions via this email itself