OK, so maybe it was too soon for the backpack!

Today I saw my radiologist due to some pain/ swelling and discomfort under my arm and in the chest areas where I had surgery & radiation.
It began while we were on the trip and we were suspecting I strained the muscles and maybe was developing some lymphodema.
The doctor checked it out today and said it is not acting like typical lymphodema and feels I overdid it carrying the backpack.
I tried swimming yesterday to see if that would loosen it up, but it just made it worse.
The good news- he said he could not feel any cancer and thinks it is just strained. I need to let it heal.
The not so good news is I can't and wasn't supposed to be lifting anything heavier than a gallon of milk. I also can't swim ( lap swimming) until next summer.
He said over this next year it will be healing and scar tissue will be forming as well as some changes to the skin. So... until next summer, I have to take it easy on that arm and keep the radiated area covered from the sun.
He said running is still fine :)
I am scheduled to have labs and a PET scan to check everything out. I will then see my oncologist. This is all part of my normal care/check up. I believe the PET scan will be next week, so prayers for good test results are appreciated :) Thanks all!