Question regarding two lymph nodes one behind ear and another in the right groin

Hi all,

im not a cancer surviver but I am just wondering about a few things regarding my lymph nodes that are swollen any help would be appreciated. about 3 years ago I went through a cancer scare when I was having drenching night sweats and fatigue constantly sleeping and not feeling great. The doctors did a biopsy on an enlarged lymph node in my neck that came back negative.  Eventually the fatigue went away but the night sweats remained so bad that my girlfriend had to get out of the bed when it happened. Now two years laterI notice a small hard pea  like lump behind my ear which has defo got bigger and in the last month there was a build up of fluid next to it that went away after a few weeks but there is some left.For the last two years maybe I was getting an uncomfortable feeling which I thought was my right testical  and a normal thing but it got very bad in the last two months and happened last week and discovered it was not my testical it was a lump in my groin petruding out.went to the doctor and she gave me antibiotics and said to call back in 5 days. so I took the antibiotics and the swelling went down but there is the same buildup of fluid that was beside the node by my ear on top of the lump which I think is a lymph nod which is still in my groin and swollen. Did anyone on this site have similar symtoms like me? I would really appreciate any opinion people woul have on this matter.

Thanks cathal