Lump

I found a lump under my armpit! I waited a few weeks to allow it to go on it's own or go down! 
When it didn't I went to the Gp and they said it was my lymph node! I got sent for a scan and she checked just that lump and said it doesn't look like anything synsiter and keep an eye on it incase it gets bigger!!

ok no drama 

that was a few weeks ago!

its still there and now on the top left side of my boob I have found another lump slightly different feeling and also weirdly have a big lump under my right side of my chin! 
Am I being a worrier or should I got back to the GP

as don't want to go back unnecessarily as first lump already been checked and I'm assuming that the scan can't be wrong?