Sorry, mate, I don't have access to instant messaging while I'm at work.
I don't know if anxiety can cause pain, directly, but I guess it is likely to make you notice it and worry about it more.
You're welcome! Sorry, I don't do Facebook, but I'll add you as a friend here on Medhelp.
I had glandular fever once, when the lymph nodes swell up. As I remember they were between the front and the side, not completely at the side. Also I think they are too large to cause a tiny lump like that, you wouldn't just have a little lump sticking out.
I'm no expert, but I'd be surprised if bumps on the neck were related to an STD. More likely some skin issue. If it's not red, or sore, or growing bigger, I'd be tempted just to ignore it and hope it goes away, but that's just my attitude!
Hope you get yourself sorted.