Breast lump.. so upset!

Hi everyone! I am waiting for the days to pass quickly so the 11th comes sooner! I have an appointment at the breast clinic and I keep getting so upset.  

Back in March/April I went to the GP with a weird feeling in my left breast… I couldn’t describe it just that it was different! My doctor referred me to the breast clinic, I went they felt my breast and sent me on my way saying it was nothing to worry about due to not having a lump or anything. Fast forward to almost two weeks ago I found a lump in the same breast, I don’t know how long it’s been there because I never check my breasts it was a total fluke that I even discovered it. I just keep thinking the worst because it’s the same breast and what if it was something back then? That’s 8 months of not knowing and time for it to get worse. I’m also annoyed with myself that I never took the time to check my breasts ever because I just didn’t know what I was doing.

Is it normal to be so upset? I can’t concentrate at work and I keep crying.