OK you've realsied you have a problem now you need to work out how you're going to deal with it.
First of all your wife is 11 weeks pregnant. She is not ill. She is not incapable. She is pregnant and she is just as capable today as she was 11 weeks ago of dealing with these issues. Its better if she's aware of them now rather than when she comes home clutching a new born and facing months of sleep depravation.
You need to talk to her and make her aware of the situation. Together you need to work out how much you have left after student loan payments and debt payments then work out a way to live on it
Cut your outgoings. Start with your weekly shop its a good way to get control. Set yourself a budget, meal plan and make a shopping list. Drop to the value brands, if you don't like them try the own brands. You'll be amazed what difference it makes to your bill. Try Aldi or Lidl or another deep discounter.
Cut your outgoings.. go to one of hte comparison sites and check you're getting the best deal for your utilties and if you're not switch.
If you have sky or cable either drop it or down grade to a cheaper package. Again switching provider may be the answer.
If you have more than one debt then snowball them. Details here
Babies are cheap. Join freecycle or freegle and ask for baby stuff. You'll be amazed what's on offer. Haunt car boot sales for equipment. I got DS 3 pairs of trousers, 4 tops and 2 jumpers for £3 last week.
That's just for starters.
And remember she's pregnant not an invalid. You're about to be parents so together you have to do your best to sort this out.
Good luck