Found a lump

Hi All, Im 44 and Im new to this site, about 18mths ago the doctor found a lump in my left breast, I went as i was having shooting pains in my left breast, ( i couldnt really feel the lump ) and sent me for a mammagram, I have yearly mammagrams  due to high BC in our family, they took a biopsy and it wasnt Cancerous, so about 2 and half months ago , i was in the shower when i found a lump again on my left breast ( not painful), when i washed , i can feel it straight away, i didnt want to worry anyone as i know they are busy and what with the COVID , i then recieved a letter stating the mammagram is running 5 months behind , 

I was talking to my friend about it and she stated that i needed to get it checked out ASAP, so i went to the docs and she has referred me for a 2week mammagram, 

i dont want to waste anybody time , could this be just scar tissue from my biopsy from 18mths ago , the lump is about 2- 2 1/2  inchs away from the scar from the biopsy .

Many thanks 

SJ