Preggo or not, she has to stop eating out. For starters. Selling the truck is a stellar idea. She's going to have to get the hell over it, to be blunt. Been there done that. We were once 56k in credit card debt, and making 1/2 of the salary I make now.
Cost savings ideas:
Stop eating out. No treats, no snacks, coffee, nothing like that. If it doesn't come off a grocery store shelf, you're not buying it. Brown bag lunches/meals at work.
Drink beer? Yea, that's going to have to go bye bye for awhile. Smoke? Time to quit, sorry.
Can you use public transportation to work? Carpool? Ride a bicycle?
Credit cards? Consolodate them into one, if possible. Call your CC company(s) and tell them you're struggling to make the payment. Tell them you want a lower interest rate. If they say no, talk to a supervisor. This might take some patience, but it might pay off in the end. Close any extra ones. Do not even open new credit card offers, just cut them in half and then shred them.
One or two extra degrees on the thermostat. Nice night? Open the windows.
You can insulate a water heater to make it more efficient. Check homedepot/lowes/whatever you have close for more info.
Cancel gym membership(s), etc. You can run and do pushups for free.
Review your last months checking account, thourghly. You might have some kind of automatic deductions you're not noticing thats draining it.
Do not renew magazine subscriptions.
She's going to have to give up eating out. You're going to have to put your foot down. I've got two spawn, so I know how hard it can be to reason with a pregnant woman.....it just has to be done. Sit down with her, show her the finances. If you have to take her checkbook/debit card.....do it when she's sleeping