Fibroadenoma Pain

So everything online says fibroadenoma is "usually painless" and "can become tender before periods" but uhhh it HURTS. The pain did start 1 week before my period but it's not just the lump that hurts, my whole breast, my arpit, my arm, my elbow all has aches that come and go (only on the side that my lump is). I also have this nerve-dull-numb-pain going down under my arm as well....

Can anyone else with fibroadenomas tell me what your symptoms are like if you have pain as well? Also does anyone know good ways to try and reduce the pain?

PS I haven't gotten a biopsy yet but 2 ultrasounds 1 week apart showed the lump shrinking so both the clinic I went to and the hospital I went to are pretty sure it's a fibroadenoma.