Hi, looking for some help and advice please with what could be going on? Im 40 years female.

September 2020 I noticed a lump by right breast/under arm and so headed to doc and due to covid to help nhs went private for an appointment to determine if lump cancer or not. Got physical check and ultrasound over lump and told no cancer, swollen lymph node and may have lump forever. I thought great and move on.  Since got a copy of letter from private consultant which said thickened breast tissue and normal lymphs.

October 2020 I woke up one morning to right arm being in agony and very sore to move, weak etc.  I had to rest, heat, painkillers and gentle pilates to get back to normal.  Not had this happen again. They thought this linked to my scoliosis.

Since then same lump still present and painful. Been back and forward to doc, was told it was muscle.  Docs finally referred me again to BC.

Breast Clinic wrote to say I was put on non serious waiting list. I went back to doc and they finally got me into hospital via plastic surgery! At plastic surgery I was thouroughly examined by two consultants (one was a breast specialist) and asked lots questions. I heard 'no lumpiness' in breasts' and told that because my lump hasnt grown much since last examined is a good thing'. Referred to BC for MRI and biopsi.

I have general anxiety disorder anyway so im sure can imagine how I feel. Its awful. Just wondering what your thoughts are on what has happened to me so far and what could be going on? 

Just now my breasts are sore / ache. The lump is very sore, feels bit bumpy. Maybe feel bit of arm ache.

Thank you in advance for any advice, suggestions and ideas about what may be ahead. Wishing everyone well and thank you so much x