lymph node lump in neck anxious

hi all,

ive had a hard non movable lymph node size of a pea up inside my neck left side for a few months and thought nothing of it because it wasnt painful. however recently visited the gp who has taken bloods and requested a ultrasound. so now im extreamily anxious especially after search on google.

please can I ask: 

can lymph node's  sometimes just be like this for no reason (enlarged/hard/non movable) but still alright?

 

thanks