You seem to be having chronic sinusitis.
Chronic sinusitis can be due to allergic nasal polyps or tumors,allergic reactions,deviated nasal septum,trauma to the face,respiratory tract infections,allergies such as hay fever,immune system cells or cystic fibrosis.
It is important to find out the cause of chronic sinusitis as then specific treatment can be started.Treatment varies from saline and steroid nasal sprays to decongestants and antibiotics.Some resistant cases may need surgery.As for the mucus removal, inhale plenty of steam. Inhaling steam from a bowl of hot (but not boiling water) may help to soften, and loosen, the build up of mucus in your nose. You may also find that adding some menthol crystals, or eucalyptus oil, to the water, helps to ease your symptoms of catarrh.Also keep your head end elevated while sleeping and apply wet warm compresses on your face.You can also nasal lavage by bulb syringe or neti pot to rinse your nasal passages.
I would also advise an X-ray or CT sinuses by an ENT specialist so that cause of chronic sinusitis can be confirmed.
Hope it helps.Take care and pls do keep me posted on how you are doing or if you have any additional queries.
Texas is a tough place to live if you have upper respiratory problems. See if there are any Salt Therapy centers where you live. At least you might get some relief without pills and side effects. There are a few across the country - several in Florida, one in LA, one in St Louis, one in NJ, Chicago, Arizona, and Plano Texas.