If my husband were laid off or on disability, would I still get withholding for spousal support?

If you have an actual court order and it has not yet been officially modified or overturned, your husband is in violation of the order by not paying, subject to contempt of court. But it is also true that such an order can be modified based on a substantial change of circumstances (which being unemployed or on disability would be good grounds) to either get the payments reduced or temporarily suspended. But it is not automatic and he would have had to file an actual motion, serve it on you, calendar it with the court and send you a notice of the hearing, and win the hearing. If none of that has happened, and he/his office is obviously not being cooperative, you should consult with an attorney right away to file a motion for contempt (also called a motion to show cause).