Thanks for the replies NMc and slyJohn.
I had read lots of tings about lymph nodes swelling to fight off infections and what not, but what I don't understand is why the aching gets a bit worse each day. The lump hasn't grown in size or anything so I don't get why the soreness is increasing. But then there could be a perfectly logical and normal reason, I'm just completely clueless about medical things!
slyJohn I actually read about hernia's last night and they said that at the night is normally when the aching is worst, which is the case for me. It's all very strange, I guess the most likely scenario is that it's just a swollen node fighting off some infection. I'll find out tomorrow though because I have a doctor's appointment for somethign else so I'll get her to take a look!