OP
I didn't read your OP as screaming 'OW', if I'm honest with you. The stress at work thing could be completely viable.
Yes, it's always a possiblity... but he is going out to work; he feels the pressure of financial responsibility for all of you; he's stressed about getting behind; he knows that the solution is to start early and finish late; he doesn't want to do that; he doesn't want to leave he house any earlier than he already does, and he knows he's going to be tired at the end of the day; he knows that the pressure/discomfort he feels at work is going to last for longer as his working day will be longer; he also knows what you're going to be thinking because you've thought it before; he doesn't need the stress of that on top of the other stress he's feeling; having a partner with anxiety is very hard...
I'm not going to be so magnanimous as to suggest that he feels guilty about leaving you with the young children for longer because, to be honest, he probably hasn't considered what that is going to feel like to you. He heard your question, not as a cry for help, or a fear of being on your own for longer during the day with the children without him/adult company/support... but instead as a critcisim of him for doing something he doesn't want to do either, but has no choice in because he needs to financially provide for you.
And of course, it's not your fault you were made redundant and it was both of your choice to have 2 small children, but now he is feeling under a huge pressure to keep it all afloat.
And of course, you are looking at this from an entirely different perspective. Because there are as many sides to a story as there are people telling it. All sides can be 'true', just different.
As for taking medication, it does annoy me when people have health concerns and won't take medication. If you found out you had cancer would you not accept chemo then on the ground that you'd only been recently diagnosed..? No, of course you wouldn't. I had quite bad anxiety for a long time. I took ADs for it and it does help. It's not a sticking plaster or a false help, it genuinely helps you to get from one end of the day to the other and gives you the opportunity to address the issues in your life that are causing you difficulty and to see things clearly.
I don't want to sound hard, but it's actually quite selfish to not take medication for an illness you have when it impacts so heavily on those around you (and it does).