I am having a hard time clearing up sinus congestion, dispite using OTC decongestants. Help!

Oral or spray? If you are using a nasal spray, this can develop into a rebound congestion called rhinitis medicamentosa. This suggest the use of the med, it wears off and the nose tissue swells again Develops after about one week of usage. The treatment is going without the decongestant. If this is an oral pill see the doctor for further advice. Your doctor can provide info on both.