When you say "I can't handle this stressed feeling":

*Say to yourself "What can I do to make myself more comfortable?"
*Some things to make yourself more comfortable include:
Stop chasing worry thoughts, because when you chase them they get worse and more worry thoughts appear.
Implement some coping skills: deep breathing, self talk, use your physical space (i.e. walk around), talk to someone, come up with a plan.
Mindfulness: acknowledge and accept that the worries are there, but them be mindful with another activity (read, listen to music).
Cut yourself some slack, remember you are doing the best you can under the circumstances.
Remember not to let anxiety control you, empower yourself - don't let anxiety trick you into thinking that your worry thoughts are important, don't let it win.

I'm getting all this from a packet my psychologist gave me, I will try to scan the rest of the pages tomorrow. Sorry if I forget!