Absolutely terrified

I am 40 years old and I'm pretty good at checking myself, was drilled into me as a kid you ensure that I do doctors was quite impressed I knew to check my underarms and collarbone and up my neck. Checked myself last week and noticed a lump in my breast. Got into the doctor's today and they confirmed it is a lump.

I gave them a family history which is my nan had a double mastectomy but no chemo or other treatments. My aunt had a single mastectomy no chemo etc. my half sister had cysts removed multiple times but no cancer and my mom had multiple cysts but no cancer.

She said because of the family history she was putting me on a 2 week referral to the screening clinic instead of waiting around for a routine appointment.

She didn't seem overly concerned except with the family history.

She results she put on my record is as follows 

Examination: chaperone offered and declined. ; both breasts normal looking. ; no change in skin or colour; no skin tethering.; left breast examination normal.; right breast had a 2cm globular lump in outer middle part , deep in breast tissue.; no axillary or cervical lymphadenopathy noticed. ; Diagnosis: breast lump; Plan: bloods; 2ww; Analgesics requested (8B3I.) pcm

It's hard not to panic I've done nothing but cry this afternoon and I'm getting conflicting info on if they think it's cancer or not. 2cm seems huge to me and I can't help but think this is a death sentence.

My friend is a medical professional and I sent them the reports and they think it's probably a cyst since I had one on that side in my arm a few years back and a few cysts in my leg a while back and that the urgency is purely for the family history to make sure I'm not waiting around. It did help my worry a little bit but I'm still terrified.

I heard globular is probably a better sign as cancer has a tendency to have ragged edges not just oval and it hurts. I thought it might be due to menopause as my mom and sister went through it early.

My brain is just imploding with panic