Had invasive ductal carcinoma grade 2

Hi, I was diagnosed in Sept 2021, had wide local incision,  complicated and lots of problems, had radiotherapy and I am on Anastrazole. 

A question I don't know what to do, I have been feeling unwell for nearly 2 weeks, very tired, thirsty, wee alot, itchy skin alot of hot flushes... min 6 times a day amd it hurts when presure is on the side of chest where I had the BC , I don't feel well, can't check nipple as I havnt got one, no redness just hurts to touch

Any suggestions what I should do? Or is this normal?

Thankyou 

June