I've not read all of this yet, so apologies if I repeat anything, but I'm so angry about some of the attitudes on here that I have to post now.
When someone becomes a SAHP, it is usually a decision made by the couple together. One partner accepts the burden of being sole breadwinner, the other accepts the burden of losing out on pension/getting left behind in their career.
The OPs DH has benefitted from the OP being a SAHM. He hasn't had to worry about what happens when the kids are sick/on school holidays etc. If he has 'enabled' her to SAH, then he certainly hasn't suffered by it careerwise.
Now it seems he wants to have his cake and eat it. He now deems that the OPs use as a SAHM is over and appears not to care about what she has given up in terms of career progression, in order to look after their DC, while his career carried on unaffected by the fact that he is now a parent.
I do not think the OP should have to take a low paid job or use childcare for her DC if she doesn't want to, just because her 'D'H has made a unilateral decision. Seems to me he's just resentful because she now has some time to herself during the day.
So OP, I think you should take the time to find a fulfilling career and let you husband explain to his boss how he won't be in work because the kids have chicken pox/teacher training day.
I also don't like this idea that the OP may not understand the family finances. I am a SAHM and can account for our money down to the last penny. I also don't like this idea that a SAHP is somehow leaching off the partner in paid employment. The children are the responsibility of the couple jointly and they need to be looked after as much as money needs to be brought in to the household.
I do consider it wrong to dig at his wife, particularly in company