Sounds like a lot of stress coming to the surface in a sudden.
Find a nice spot in your house. Breathe, breathe deep, move your breathing to your nose. Not fast breathing. Close your eyes and try to focus them both right between them but just a little high. relax your body, might have to do it area by area on your body. Keep your back striaght. Just keep your closed eyes focused on that spot. Feel the breathing. Be conciouus of it. Do it for a while to till you get relaxed. Takes practice, but try it. If you have relaxing music it might help a little.
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Just enjoy what you do, as best you can, and let the dog out once in a while.