Anxiety, Stress, Majorly Overwhelmed

I am starting to get to the point where I can't do it anymore.  I don't find joy or excitement in ANYTHING.  It all just feels like one big. ass. chore.  Getting up in the morning is hard (especially when everything hurts and I can barely even roll over in bed).  Driving kids to school and all the way to work seems like too much effort (especially because I know that by the time I'm 5 minutes into my drive, my back will be throbbing, and by the time I get to work, I can barely stand all the way up and walk.  Stepping up the curb seems like climbing a mountain).  Within 10 minutes of being at work, I know something is going to irritate me enough to make me want to run screaming and never come back.  I am tired all. the. time.  I have trouble concentrating (and trust me, if you can't concentrate when a million people all think their demand on you is the most important, it makes a job REALLY hard).  By the time I leave work all I want to do is sleep.  For, like, 3 weeks.  But leaving work is when the hard part starts.  I have to drive way out of my way to get Trent.  I don't mind, it just makes when we get home even later and it's hard to get ANYTHING done.  By this point, I would drop if I could.  But I can't.  So, I plan dinner, do errands, and have somewhere to go almost every night.  If it's not karate, it's scouts, or church, or my mom wants to do something, or or or or or or or.  There's seriously not a SECOND that's unaccounted for.  EVERY day.  I am so worn down.  We have come up with this homework/reading/chore chart for the kids and it is NOT working.  For me.  Because suddenly, all this shit that we (Ryan) wants them to do, becomes my problem.  Did you clean your room?  Well let me check.  Oh you need to do this and this still.  Oh, you did this and this?  Let me check.  Oh you still forgot this.  You finished?  Let me check.  Ok, you still need to do this little thing.  You did?  Let me check, AGAIN.  Ok, it's fine, now time for chores that I have to check 5 times, then homework that I have to nag you about, then reading and a reading log for school AND karate that I have to nag you about.  Times 2 kids.  Brush your teeth, wash your hands, shower, pack your lunch, set your alarm, blah de blah blah blah.  So far, every, single, f*#&ing night, their responsibilities become MY problem and makes our night 8000000000 times more stressful.  Feed your pets, pick up your belongings, nag nag nag.  In the meantime, I don't have a second to relax because I'm checking the bazillion things they have to do with no time to do it.  Every night has become a late night because there aren't enough minutes.  Then this cuts in to my time.  Ya know?   That CRAZY thing called me time.  What's that you ask.  Yeah, I don't know anymore.  By the time I'm tucking them in (or, often, LONG before), I'm ready to drop.  I feel so far beyond overwhelmed and unhappy and stressed and absolutely crazy and depressed.  I have no help, I have no one on my side, I have no time.  Sometimes, I hope I get hit by a bus.  I know that's NOT good and I really don't mean it, but what the flip?  How long am I supposed to be able to go on like this.  NOTHING is fun, nothing feels good, nothing is how I wanted it to be.  I am drained and I'm running myself completely ragged for absolutely nothing.  I don't know what to do anymore.  I don't want to do anything but sleep for a year.  I love my kids so much and I am NOT being a very good mother.  It's pretty hard to feel like you are when all you do is pack their day full of chores and obligations, nag them, and snap at them because you're lonely and exhausted.  I am not happy at all with how my life is going and it's ruining my mental well-being and I'm sure it's not helping the physical bullshit, either.  I wish it could all just stop.  The pain, the grumpiness, the fatigue, the irritation.  I don't know what to do!