My Spouse just took an entry level job and has left me holding the bag

My husband and I are both in our late forties and have been married for over 10 years. We have children together and a boatload of bills. Back when we first got together, we were both doing well financially and made a decision to get married and buy a house, etc...in the 10 years since then he has changed jobs 9 times. At first it was by choice, always looking for the 'perfect job with the perfect paycheck' and then in 2009 he was fired for not complying with a company policy. We were devastated because we had just dumped a bunch of money into our property. Long story short, he has had a hard time recouping his previous salary until this past year. We were getting back on track financially and then about a month ago he decided that he could no longer handle the "Blue collar" work that he was performing and he applied for and received an entry level position that is paying $10-$15k less than his last job. He is currently away for a 3 month tr aining process and has left me home with all of the responsibilities including being the main breadwinner in the household. I am getting to the point where I am so resentful that I wish I could pack it in & leave. I a trying to be open minded & Empathetic, but am not sure where the line in the sand should be drawn. I have been steadily working for the same company for over 20+ years and because of our finances, have never had the luxury of even considering a job for less pay. For the past 5 years my salary has doubled his. My real problem is that because of our current credit score I feel trapped. Help!

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