I'm in an incredibly similar situation, so I can relate very easily.
I've had swollen lymph nodes around my groin, under my arms and neck, and it's caused me to have numerous panic attacks. The biggest one feels nearly 1cm big near my groin. Although they don't really hurt that much, they feel very uncomfortable. I get night sweats all the time, and sometimes I feel odd sensations around my collar bone, but can't tell if it's just in my head. I've been to the doctor several times and had an ultrasound, but I felt as though I was being dismissed as a hypochondriac. The ultrasound showed nothing and he said my lymph nodes were fine, even though I can easily feel that they're swollen and cause me a lot of discomfort. I've had 3 blood tests and I still have no idea what's wrong, one common result that keeps coming up is elevated bilirubin (Gilbert's Syndrome), but I still can't tell if it's just an infection or something viral. My symtoms feel very similar to lymphoma, so I'm getting really scared. Do you know if a physical examination, blood test and and ultrasound enough to diagnose lymphoma?
Sorry I'm hijacking your thread here, but I think we're both on the same boat. I plan on going to the doctor very soon to ask for a biopsy, and I'm nervous as hell. It's very hard to find any form of relief that isn't a drug or involve dangerous thoughts. Planning out my own quick and painless death, just in case I get a terminal illness helps me more than it should. I'm in no rush to leave this earth, but I just don't think I could live with the fact that I'm terminal.
Hope everything turns out well for you, feel free to PM me if you want a chat, battling this alone can be really tough as I've now discovered.