I'm planning to not tell my husband that I lost my job as of three weeks ago, even though our family is cash-strapped and we need to plan ahead.
Is there a particular reason you don't want to tell your husband?
I don't want to add more stress to his life.
I don't think keeping this from your husband is a great idea. Partners shouldn't lie to each other about such important things. You should tell him as soon as possible that you lost your job so you can decide together what the best thing to do is.
Nah, I'll just tell him my boss got a mad face and I quit.
I don't quite understand what you mean, but I have to advise against lying to your husband again about the circumstances of your job loss. If you were laid off, he would understand, but you need to be open and honest so that you can plan ahead as a family.