Hi, a year ago I found a swollen lymph node in my neck. It's small, tender when you press on it and hasn't really grown or changed much. I just find it a bit weird that it still hasn't gone down after a year. I don't know whether that's normal or not, so I went back to the GP and they said it was fine and told me to book another appointment if anything changes. I woke up this morning and all of a sudden, I felt a slight pain in my chest and I also felt really faint and dizzy. I suddenly slumped onto my sofa because I needed to sit down and I was terrified because I've never experienced that before.

I feel much better now as I relaxed in bed for a while and had a cup of tea but I've been googling all my symptoms and the results kept saying Leukemia and Lymphoma and now my health anxiety is through the roof(literally crying as I type this). I'm going to book an appointment with my GP tomorrow but part of me is too scared to go in case the feedback is bad. I'm just really scared right now and I just want some advice on what to do!

For context I'm 20f.