lymph glands in elbows - symptoms

I've been having some odd symptoms, and I'm curious if there is cause for concern of Lymphoma and where I should begin. I've noticed a soreness in my elbows . . . like a swollen gland soreness when I'm typing on the computer. Discomfort, mainly. Also swollen and sore glands around face, cheekbones, etc. Also, an odd swelling in my arms and stiffness in hands, like arthritis. I've also had clinical problems with numbness in my lowers extremities (feet & calves) while exercising. I'm a cyclist, and all of this starting to show up at the end of last year. Been through a battery of tests, with nothing conclusive (possibly some lower back nerve constriction). Should I be looking at getting tested for Lymphoma? I've been through some pretty phenomenal life stress in the past couple years . . . leading to PTSD & Depression. Feeling better since addressing these things, but still worries about swelling in arms, stiff hands, elbow pain & foot numbness.

any advice will be appreciated.