Have you thought of leaving your son at CC while you go for a FT job? Or maybe get a trustable nanny or maid?? I always feel that it is better to tc of children on our own but if staying at hm is driving you mad soon, then i think it is time for you to get out of the house to wk, not only can get extra income and also you wont feel so depressed.
I'm a stay at home mum too, and we gonna be more thrifty than the others in order to save more money every month. and we both dont expect any gifts from each other for bday, vday or any anniversaries, just a cake (for bday) and a meal for any occassions will do.
Everything can be sort out if you calm down and speak to your hub. Discuss with him which is the best option for your son if you are going out for a FT job. =)