Hi.

a couple weeks ago I noticed a lump just under my ear on the left side of my neck which I'm assuming is a swollen lymphnode. 
Now if I lay down I can feel another lump just underneath the other one which is causing me slight neck ache. (If I rub it it eases the ache but then makes it worse after a couple of seconds) this lump does seem to be softer and move whereas the other one is hard and doesn't move. 

my glands are swollen and have been for a couple of weeks and I can feel 2 more little lumps either side of them (again assuming lymphnodes).

I have no sign of infection. Is this a cause for concern? I am driving myself mad with worry. I am currently being investigated for a high heart rate and palpitations, could it be linked to this do you think?

Has anyone else had a similar experience with these kind of lumps?