New here

Hello everyone, I have tried posting before but did not get any response so I hope people don’t mind if I post again. I am just asking for a bit of hand holding really as I await my appointment at the Breast clinic next Wednesday.
I have a small lump in my r breast and have now developed pain in my underarm and shoulder blade area on the same side.
i have only told my husband (only because he was planning a trip abroad) as i had a scare before and do not want to worry people when there is no need. Can’t stop thinking about it especially since this pain has developed and even though i know most people end up with an ok I cannot stop myself imagining all the bad what ifs!
So sorry to waffle on but I know I am not the only one so would love some response