Lymph node swelling. Of lymphoma?

2 months ago I have lymph node swelling on my two armpits. Then I visited our family doctor and he give antibiotics for me. After 2 weeks I suffering this problem.There is a lump(less than 1c.m in diameter) on the right part of my neck 1 inch below the chin bone. Since it is very small it is not visible outwards. But I felt something on my neck. This lump is not rigid or firm. It is soft and whenever I touches it starts sliding. So I visited doctor twice and he said that; "if it is not enlarges you do not want to think about it". But  sometimes, I feels there is something on my neck. But until now the lump is not enlarged. I have no night sweat or sudden weight loss. Is there is any chances of Lymphoma?