Verge of exhaustion

I don't realise sometimes that I have lost the art of relaxing. I just cannot seem to do it anymore. I try and everytime I fail sooner or later either its because I have a screaming child or my husband needing something or one of the dog's getting into trouble. It almost seems impossible anymore . I am frustrated and usually in a rather grouchy mood because my moment of tranquility was ruined. I wish I could yell and scream as loud as I can but I have to settle down for grumbling under my breath because I have my kids watching my every move. I am more frustrated because I cannot express the way I feel anymore or even let out a loud scream to cleanse my system.
Perhaps I have definitely lost the art of relaxing.I cannot sit through a movie anymore. I had rather just fast forward it and watch the parts I am interested in and then get on with my life. I have definitely lost the art of relaxing.I try so hard to tell myself not to read in the bathroom but I think thats the only place where I have some sanity so I grab a book and I can perhaps skim over a couple of pages when I realise I have something cooking on the stove. I have definitely lost the art of relaxing.
I am in the verge of exhaustion and my mind and body is crying to tell me that I need to slow down and is crying to get a break . Life sure has spinned out of control with so many things happening ,I definitely have to tell myself its important to relax too in order to be productive.Somebody tell me how I can relax. I am beginning to understand now that I can no longer do "nothing" .