Fibroadenoma, benign tumour or cancer?

Hey there, 

I found a lump in my right upper quadrant breast about 1.5 months ago, told the drs day after I found it and they told me to come in right away, got a physical exam and she said she would refer to hospital for scans 

for context im 24 and we have no history of breast cancer 

anyways I get an appointment and the day before, it gets cancelled and Rescheduled for two weeks later :( 

after two weeks of waiting I go to hospital, have physical exam, go through to ultrasound and then have a biopsy 

lady who did scan said that it looked “abnormal” but said it’s likely a fibroadenoma or a benign tumour which would need to be removed, I asked if it’s likely cancer and she hadn’t mentioned it and she said it’s unlikely due to my age, but I’ve read enough online to know that whilst younger people don’t often get it, that it’s obviously still possible 

I don’t know if her mention of it looking abnormal should be a concern? I don’t know what she was referring to? It was a big black mass on the ultrasound screen, not perfectly round or anything, more oval 

so I’m really struggling to relax, the lump is extremely mobile, it’s hard, deep in the tissue so not visible, no other symptoms at all, no pain, no discharge 

im just really struggling to stay calm, I keep thinking if it’s worst case then I’ll deal with it but it’s easier said than done 

not sure what I’m looking for by posting but I’m just scared haha