Suggest Treatment For Right Breast Carcinoma

Question : My aunt is diagnosed with T2N0M0 right breast carcinoma. 3cm, ER+, PR+, HER2--. Quadrantectomy done with axillary dissection on XXXXXXX 9th, 2017. TC*4 chemo given with 21 days radiation. Chemo completed on 27th April, 2017. Radiation completed on 26th May, 2017. Currently on Femara started from 27th May, 2017.

She had left neck pain couple of weeks back and consulted an orthopedic for the same. He took the x ray and told it is normal. Since she was complaining neck pain while she try to swallow as well, doctor told us to consult an ENT specialist for an opinion.

Below medications are given:
Altraday - 1 tablet/day for 5 days
Nortryptomer-p - 30 tablets but she took only 7
Pantocid - She took along with Altraday
Myoril 4mg - 2 tablets/day for 5 days.

After taking these tablets she started feeling better and even the pain while swallowing was gone, so we didn't consult the ENT as we wanted to wait and see. Mid of last week after completing the above medications, she told that the similar pain is felt in right neck but it is not as intense as left side and it was manageable. But today she again complaining the severe pain in left neck but pain while swallowing is not there.

Questions:
1. What could be the reason for this neck pain? Any medication you suggest for it.
2. I consulted the oncologist and he had suggested to wait consulting ENT for few more days and he feels it very unlikely because of metastases as she recently finished the treatment and also she was at early stage. What is your opinion on this?