Hi JudyB,
I had my lumpectomy and axillary clearance in January.....I too had something similar along with severe neuralgia and cording in those areas. The neuralgia is caused by the severing of the nerves from the axillary clearance and the cording id caused by the disruption of the nerve channels, in which they become tight and twisted. I found ice packs helped with the neuralgia and heat packs woth the shoulder..
Mine got better after a few months of doing the exercises the nursing staff gave me to do post op (once the drain was out). It may seem to take forever, but persevere....and take your time, don't push too hard.
I also found that getting into the physio helped with the shoulder, i was given exercises to help strengthen the muscles there.
I still have the neuralgia down the back side of my arm....and had to stop physio because my mastectomy surgery was bought forward...so I have now taken a tumble back down the ladder....but I'll be climbing my way back up in no time!
Please be aware that healing is a slow process....take your time...do the correct exercises....be kind to yourself
Wishing you all the best...