Hii, you said you have had gaseous feeling since one and half years, from what i understand it can be gastritis or acid reflux both of which can be relieved by taking antacids. If I were your treating doctor, i would have suggested you tab.Omez 20mg or tab. Pantop 40mg once daily on empty stomach. if these doesnt relieve the symptoms, combination of an antacid with mucain gel is better in relieving gastritis. Avoiding spicy foods and having proper meals at regular intervels can greatly decrease the gaseous feeling. Lymph node swelling usually can occur in minor bacterial or viral infections of throat even though there is no septal deviation. Sinusitis (infection of sinuses) also causes lymph nodal swelling sometimes. I would suggest you to get an Xray of para nasal sinuses which gives a clear picture if the problem is with sinuses. These conditions can be treated with taking antibiotics like amoxicillin 500mg twice daily when u have episodes of swelling. I hope my answer helped you in clearing your doubts. thank you.