Boy I feel the exact same way.Deep breathing has never helped me but you can try this if you want sometimes it helps and sometimes it doesnt.IT is called visual therapy.Try to think of something that makes you happy then try to lay down and relax if you can.For instance for me I see myself walking along the beach,swimming and fishing.It helps sometimes .I love the ocean.When my husband was alive he did everything for me.Now I have to do everything myself and believe me it isnt easy.There are times when I actually break down and cry because I cannot take it anymore.Me to death scares me.I wake up with so much fear every single day from the time I get up until the time I go to bed.My hot water heater drives me nuts.I have to put my headphones on other wise I develop a panic attack,The humming really gets to me ,It use to be really bad so much so I would kick and cry.I cannot shut it off not allowed to here in elderly house,I am scared all the time and I am so tired of it too.If you need to talk you can always talk to me.