What do i do now? i have had a swollen lymph node in my neck for about 6 weeks now. sometimes it is easily felt but other times it is not so pronounced, but is always larger than the right side. i recently went to the doctor due to this and pain in my sp

You : You should have a ct scan of your abdomen and pelvis to get a good look at the liver and spleen. Also make sure you get a cbc, if your white count is elevated then the lymph node should be investigated. Lastly, since you are a smoker and have had such a significant weight loss, a cxr is also a good idea. Best of luck.

See a doctor: Go to a local medical clinic and have the doctor evaluate the nodes, better safe than sorry.

Monitoring Centers: Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells and digested food. Lymph nodes "taste" the lymph for anything bad like bacteria/viruses/cancers, etc. When it detects a problem, it alerts the immune system and your body reacts. They enlarge in response to the inflammation they create when they react. They shrink when all is well.