How do you "RELAX"????

I am so stressed out all the time. I work in the finance business, I'm married, have 2 kids, and put in most of the work at home. I'd like to fuss at my husband and nag him to help but at least I have an office job. When he comes home after 8-10 hrs he's been out in the heat doing physical labor and on my late nights I roll in at 9pm so he has those nights to cook. I swear I don't ever sit down and relax. I sit down and I worry about the bills, or the house being dirty, the groceries need gotten and the dog needs a bath, did i water the plants? f*** no! Maybe I'm going through a mini-crisis? I haven't watched an adult TV show all week. I've seen every episode of Blue's Clue's and Wonder Pets that there is. Tomorrow is my cleaning day but my husband has a firework bbq planned for the 4th and my only response is really? DO you really have to invite EVERYONE over here after I clean this house top to bottom? I need to relax. My 2 yr old doesn't go to sleep before 1am and she doesn't take naps. I keep laying her down, she's still up now. My husband can't manage to stay awake past 10pm. I'm really sorry if it sounds like a rant. My stomach is constantly in knots and I wake up various times throughout the night. I'm usually not stressed out over everyday life but I guess it's wearing down on me now.