Please don't try to stress yourself out okay!
The amount of horror stories I read online about lumps and bumps in the neck and all of them said cancer, my doctor saw me and said they are absolutely fine!
I feel loads in my neck, I think under my armpit and some in my groin!
The ones in your near your elbow are not known as Lymphoma nodes, I would bet you're just feeling something that's always been there!
Be calm and get the reassurance