You, my dear, are in what I call "survival mode". Everyone needs a piece of you every second of the day, and there really is just literally no time to care for yourself. Add in a man who can't appreciate the efforts you put forth to keep everyone happy, and it's no wonder you feel like you are about to explode!
Please remember that your situation is temporary. There will come a day when you do have time for you, and in the meantime you hold on like holy heck and try to stay sane!
A couple things I would suggest
1) you have every reason to be tired all the time, but if you are a big-time snorer or have been told you stop breathing in your sleep, you might want to get yourself checked out for sleep apnea. I was in true survival mode till I got my sleep fixed, now I find that I am thriving and getting everything done and more. I can't begin to tell you how different I feel after a GOOD night's sleep.
2) Don't even worry about exercising right now -- I'm serious. You will lose weight just watching what you eat at your weight and activity level! I started off not exercising at ALL and losing weight just fine, and there's no way in the world you should be stressing yourself out over working out at this point (IMveryHO).
3) I agree with Learn that when you get the girls to daycare, definitely use that time for YOU, but also make sure you are going to the grocery store and doing some meal prep. You can set it up so that healthy meals are much easier, and also yummy, with a little planning. I know it seems overwhelming, but one thing at a time!
4) I also agree with Learn that that man of yours needs to learn to drive for criminy sake! Good gracious, that's the stupidest thing I ever heard that with all the kids, your work, the dogs, and yourself to care for, you need to be chauffering around some dude who is capable of driving himself! AND bringing him lunch. No way, seriously!
5)
Edited to add: Getting it on? Don't make me laugh! Learn to drive and fix your own lunch, buddy, then we'll consider getting it on! oh, hahahahaha