Hi Karen firstly...Happy birthday for today. 

Sorry you have found a lump, but you have done the right thing on going to your gp.

I can't tell you what it is ,but all.i know is it doesn't always mean it's cancer ,it could be yes, but it could be a number if other thing's.  It could be  a cyst ,or a fatty breast tissue lump,some women are phone to them .  I know its hard but it's best to have a refferal  to breast clinic, as all  breast care staff are trained to get to the bottom of what ever it is. Try to stay positive and untill your appointment do thing's to take your mind of off, the overthinking  and dont Google, as it can make you worry worse than you allready are .Good luck  and I do hope the time goes quickly, so you can get your answers. Always here if you need to chat. Xx