I agree that your husband hasn't perhaps communicated very well. However, as the sole breadwinner myself, I do understand how it feels to be stressed about finances. As Caviar said, the comment about, you know, 'just' being in debt for a year or so would stress me out - I'm not sure if you've expressed that feeling to him, but it may make him feel more pressured?
Something that works for me is to be accepting of someone's concerns but put it back on them, if you know what I mean. So, sure, he wants you to work more hours than that - that in itself is not such an unreasonable request. But, given the agreement that you previously made, how would *he* suggest you do that and adhere to the agreement? What would *he* be willing to take on in the mornings/change at home if you are agreeable to working late? If you seem open to discussing what his issues are then he needs to be open to accommodating changes that will need to be made for them to work. I guess I'm talking about give and take.
I don't think what he is said in essence is particularly hurtful, at least not how I read it here. Do you feel that he hasn't acknowledged your illness and triggers? Or does he not acknowledge how much you contribute to the family as a SAHM? These are both very reasonable feelings, and I think worth discussing. I know when I'm worried about money I tend to overlook other factors sometimes.