It may be due to sinusitis
You should have proper treatment for that wchich includes a combinationf of
1. An antibiotic such as Tab. Augmentine 625 mg twice daily for 05 days
2. An oral decongestant such as Tab. Loratidine
twice daily for 05 days.
3. An antiinflammatory agent such as Tab. Ibuprofen
400 mg thrice daily for 05 days.
There is nothing to worry about you will be fine in a day or two.
I hope I am successful in solving your query If you have further you can ask me
Take care and good rest
Dr. Azhar Sattar