Lymph nodes can be felt under jaw? i have some 1cm-1.5 cm all like in a line is this ok. is it considered swollen?

Yes.: Lymph node size varies. But if you can feel them, they are considered enlarged. The bigger they are the more concerning they become. See your doctor for further evaluation.

Monitoring Centers: Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells/digested food. Lymph nodes "taste" the lymph everywhere for bad stuff 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.