Concerned about lymphoma but blood test came back negative?

[justpeachyy]

Should I be concerned about lymphoma even if my blood tests came back okay?
I've had a swollen lymphnode on the left side of my neck for probably 8-9 months now. I also have a few behind my ears, one that's always there and doesn't really change along with also sometimes getting other swollen ones behind my ears that can be painful. I've never noticed any others on my body, but I also don't really look for them.
I'm a 20 year old female, not exactly in the best health. I'm pretty much always exhausted and not feeling well. A lot of it I and others in my life just dismiss as depression/anxiety and my terrible "IBS" (that's a whole other story)
A few months ago I went to my PC and told her about my lymphnodes, along with occasional night sweats (Not so much anymore, but I do get very hot when I'm asleep and am pretty much always freezing during the day) She felt and looked at them, and ordered to have a blood test done. My blood tests came back normal with no other possibility/reason for my swollen lymphnodes. The swelling hasn't gone down, when I tilt my head back it becomes pretty visible and sometimes feels almost moveable. Do my blood tests confirm that there's definitely not something wrong? Should I further pursue this or is it something I shouldn't be worried about?