Septoplasty / post nasal drip side effects. Is there another procedure to fix this?!

I'm a 39 yr old male. Good health, 5'9" about 172lbs. In 2010, I had a septoplasty done. Since, I've always battled with post nasal drip. I've always been under the impression that I had to choose between better breathing & post nasal drip. At the time I felt better breathing was the best choice! Now, I'm constantly clearing the phlegm out of my throat, sore throats, sometimes feels like a lump in my throat, tonsil stones, constant swallowing. Is there another procedure to fix this?!