Am I having a meltdown....

This week has totally taken it out of me, I worry as I've been getting chest pains, maybe all the stress, haven't told anyone, who would care anyway, I'm so busy trying to keep everyone else happy around me that once again I take the back seat.
I go to work, do what is required, its not an easy job when you have to deal with lives, lives of dogs and cats, decide their fate, emotions have to be put aside yet I am human and eventually it all gets to  me.
This week went a lot better with kids but I am exhausted with all I have to cope with. My partner doesn't face the responsibility I do, he gets to come and go as he pleases, make a mess in the house, turn a blind eye to things, me on the other hand, I have responsibilities...
I envy that, the fact that some get to relax after a day of work, even the week I don't have kids I have so much to cope with.
Losing track again... I go to work, then its the rush to collect kids, deal with idiotic morons on the road, get home, sort kids, sort dogs, sort cats, wash dishes, clean house, tidy some people's mess, pick up after them, if he's not cooking and adding more mess, sort the supper, bath kids, oh and there's washing to do in between, sorting, folding, get kids to bed, then finally sit and my mind takes over as to all I need to do the following day...
Everything irritates me lately, its become a mundane life, there is not fun factor, zero to look forward to.
I need to make sure its all organized, its live able, that there is order in the chaos, I only have me to count on, me, the one who just does does does and goes goes goes.
I'm not saying he doesn't help me, he does his bit, the easy parts, I would love to come home to a clean, tidy house where all my washing is done and neatly folded and packed away, but that won't happen as its become my duty.
This was supposed to be the first weekend in 3 weeks that I would have some space from kids, some relaxation time, but alas we have his daughter, I don't begrudge that at all, but I need space, no kids, none of the complaining... but that's your indaba this round, I've done my week, drained of all that is me, time for your responsibility....
I am quiet, tired, left to my own thoughts....