No wonder, I would worry if you were not anxious under the circumstances, cancer, the unknown, a kid you didn't know about, another unknown...and losing interest, maybe a touch of depression? How long ago did you find out about the kid and how long has he been/will he be there? Any chance you could give him a chance? What kind of kid is he?
Sounds like you are doing the right things. Anything that you know makes you feel better---knitting is good if you can get into it----maybe some deep breathing, dancing,
yeah...
I've had severe problems with anxiety since I can't remember when (really hit when I was 19)---In my 30's I finally went the med route and it helps. I still need to do other things to calm down...and to keep moving....
At work, I go to the bathroom (time allowing) and sit for a few, breathe, wash my hands slowly, dry them slowly----sometimes I find showers soothing, jumping in a river or lake works better...