Hi ya - It is still early days for you - it takes about 6 weeks for the pink (and heat) from the rads to go away .... and you will probably see your Rad Onc specialist again about that time - so make a note of any concerns you have to raise with them.
It can be a continuing thing, this 'pain after' thing! :( Every now & then, I get sharp stabbing pains (similar to what I had now & then during Rads - more in the boob than in the node area ...) and now & then, when I roll over at night, I feel more of a 'discomfort' than pain ... but I am monitoring it!! Also had a bit of a pain in one side most of yesterday & still there today - not sure what has caused that!! grrr (I finished my rads in late March & am now on Letrozole for 5 years.)
I had more of a continual 'ache' in the node area & luckily it has settled down - tho the area is still numb to the touch.
All the best on your recovery xxx