Is it a lymphnode or nothing to worry about??

Hi,

I am a 22 year old female. I am generally healthy, I am a mom with a part time job. I suffer from some anxiety as many people do. Which is probably why I am posting on here, just to get some peace of mind. When I was about 16, I found a bump on the back of my head, more toward the left side. I can feel it move a little bit under my finger up and down, but doesn't move from side to side...feels hard, but no matter how much I poke and prod at it, it doesn't get any larger in size or become tender, or ache. According to everything I have read and diagrams I have looked at, it seems to be a lymphnode. I asked my doctor at the time to check me out, and he did. He didn't feel the bump I was feeling. It reassured me, so I didn't worry too much about it. Now, I'm a little older, and I noticed I still have it there. Every thing I read keeps saying that it is an occipital lymph. So I went to another doctor, and he also felt my head and felt nothing. He said it was just my occipital bone. So I have had 2 doctors feel my head, and both of them felt nothing. So, my question is...is my anxiety playing tricks on me and just making me become panicked about something that I should just relax about? Or are the health professionals just not feeling it? Because I know that side of my head feels different from my right side.

I know this is a really stupid thing to be freaking out over, but I would just like some peace of mind and to maybe have someone who feels the same way as I do to reassure me.