Breath!! :)
I am in a similar position, but I work from home one day a week, the rest in the office. I have two boys, 6 and 8. My husband also works full time. The first thing I notice is your husband is not helping much. You need to enlist his help with my house work dinner prep, etc.
That being said, I am struggling seriously right now to stay motivated to be at work. I feel like I am running nonstop and missing it. We do so much with our kids, but I long to just be there with them, and hang out.
My husband says I should quit, but find something part time to do while the kids are in school, but still thinks I can bring in the 66K I am now...Back to reality, that is simply not going to happen. We are debt free except for the mortgage and student loans, and I too am a worry wart about financial stability and putting all of the onus on my husband to support us.
After some discussion, we are going Dave Ramsey style (Sort of) and paying off all student loans by the end of the year, then saving like mad and I'm done the end of the school year. At that point, I'm going to have my first real summer vacation since high school, then look for something part time that brings in some money, that I actually, OMG, enjoy doing!! Who would have thought!
I plan to start volunteering (Yes, adding one more thing to my plate) this year, so that I am established by the time I need a part time position. I plan to supplement that with some crazy couponing and just plain living more simply. And enjoy my husband and children while they are under one roof.
Breath, talk to your husband, come up with a plan, and work together.
I understand you think it's a great job and you may not have that opportunity again. You should think that. It sounds like a great arrangement! (I'd love to know who you work for and if they are hiring)
But if you propose a part time arrangement, and if that is turned down, then leave gracefully, and let them know why. You should be able to come back in the future on good terms.
Life happens fast, don't blink. :)