Hi Hopeful,
It’s quite right your GP has referred you to get it properly looked at, as only the clinic can sort it out for you.
It’s quite usual to notice other symptoms when waiting, but mostly, there turns out to be another explanation for it & by far, the vast majority of women here turn out Not to have bc. It is the least likely reason for your breast change.
It can help to carry on as normal, keep yourself busy & avoid any general googling as you won’t find an answer & it only makes anxiety worse for no good reason.
Let us know how you get on if you want to.
ann x