Thickening after lumpectomy

Hi. I had a lumpectomy in 2017 followed by chemo and radiotherapy currently taking Tamoxifen.  Just lately I have noticed a thickening in the affected breast mainly when I take my bra off . In the morning it doesn’t feel as bad but still there even if a have a bra free day . I’ve heard a about fat necrosis  could it be this I only had my annual mammogram in September that was all clear . It’s so hard to get a gp appointment just was after some advice thanks

May be worth asking this in the Ask the Nurses section ?

forum.breastcancernow.org/t5/Ask-Our-Nurses/ct-p/Asknurses