Hi..
If you have such a severe sinus pain then it can be due to severe infection in your 
sinuses..
Blocked and inflamed sinuses causing sinus pressure can be a cause..
Percocet can help with the pain but along with it getting checked is a must for appropriate treatment.
I would suggest you to consult an Emergency room or an Otolaryngologist and get evaluated and a thorough clinical evaluation and investigations like PNS view 
x ray  can help in diagnosis and treatment can be done accordingly..
You can be advised a course of antibiotics, decongestants like Pseudoephadrine, do saline 
nasal irrigation, steam inhalation and use a humidifier in your room..
You can also be advised decongestant nasal sprays containing 
Xylometazoline or 
Oxymetazoline..
Avoid spicy and chilled foods..
Do warm compresses around nostrils..
Hope I have answered your query. Let me know if I can assist you further. 
Regards, 
Dr. Honey Arora, 
Dentist