Few things I can think of...
The base chaplain can help with food.
Apply for Food Stamps NOW. Have birth certificates, soc sec cards, your DH's pay info, bank statements for the last 3 months, your utility bills, your truck payment info and ID for yourself and your DH.
Is your DH's truck clean? Inside and out? If not, get it that way. Shampoo the carpet, fix any dents and dings, and list it on cars.com or ebay.com
Get that truck sold and ditch the SUV idea. A used Ford Aerostar that'll last at least a few years can easily be found for about $3000 or much less (we got a very nice clean one for $2500). MUCH better gas milage then an SUV.
File your taxes and claim Earned Income Tax Credit ASAP after your DH gets his W2 in January. He should get $2-4k back
Also, once the truck is sold, downgrade your car insurance to state minimums. I'm sure you are paying an insane amound for full insuance on that truck.
I know how hard it can be trying to get ahead.