All I could do is encourage you to give up work. Where else would you rather be (awake) but to be giving everything you had (not what is left over) to your precious children. While the work can be monotonous at times, I have found it to be much more rewarding than work (nursing). I miss being at work still but would not go back until my kids are ready (during school hours).
I went through a whole "identity crisis" thing but have found that I am a mother first and most importantly. They are worth all of my care. My career can now wait.
All the best with your decision,
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