Breast pain right side into arm pit

Hello I’m newly a year out from having triple positive breast cancer on my left side done the chemo and had 2 Surgeries and done radiation about 5 months ago i noticed a pain in my no cancer side side of breast into arm pit and it’s still try today hasn’t got any worse some days I feel it more than others I’m currently on zoladex injection to stay in menopause and I’m on targeted treatment I have had few feel it I don’t feel a lump like when I felt my tumor like it’s more like a long muscle lump and a rope of little lumps I don’t know sounds odd I know I had my physiotherapist feel it she said it was a muscle I had my chemo nurse feel it she said muscle and then at radio had them feel it they said it was glandular tissue see my problem is I don’t trust them after not believing I had breast cancer last year and I had a actual lump then now it’s like they don’t believe I’m in pain the other side I pray to god it’s not cancer again