Lymph node in groin. Like lymphoma?

Hello, 1.5 months back I had swollen lymph node on the right side of my neck below my jaw line. I was prescribed Cepodem for 7 days and an USGA. USG showed reactive nodes over 2 cm in length and loss of hilium. Now my neck lymph node have came down. Both side feels same. Previously I could feel the right side. There is no cough or cold. Recently I am able to feel lymph nodes in my groin area. More prominent in my left groin by touching. Apparently the skin is not swollen currently. Is it swollen or is it normal to feel groin and inner thigh lymph nodes. I have slight back pain at some postures and very occasional pain in middle chest. No problem in breathing or swallowing. Just chest sometimes hurts while shouting. 1.5 month back chest xray was done due to other reasons and was fine. Is there something to worry about like lymphoma? My general physician told it's just my stress. I have occassion here and there weird pain that goes away.i am pretty scared please help me.