First, swallow your pride and find a food bank. You and the baby need it. While there, ask if they know of any agencies that can assist people with rent andor utilities. Sometimes churches will come to food banks (or other locations) once a month and write out a check for a portion of the bill.
Second, take inventory of what you do have on hand. How many tubes of toothpaste, bottles of shampoo, etc? Do you have any sample packages? What's in the cupboard?
It's really hard to figure out what to cut when there's nothing left to cut, isn't it? I would not recommend getting rid of cell phones right now, not with a baby on the way. If you won't be penalized (and if you haven't already done so), reduce it to the cheapest plan possible. I read something recently about someone reducing their phone bill using Google Voice; I'll see if I can find it again and post it.
Does your electric company have "peak hours" or do they charge the same rate all day long? Ours used to, and we tried to use as little electricity as possible during those hours, saving things like running the washing machine until later in the day when it was cheaper. Now they charge the same rate all day, so we can't cut down on the budget that way. :/ Still, it's worth a look at your utility rates.
Additionally, you may qualify for your utility company's low-income rate. Look into that too, if you haven't already.
How do you access the internet? Is Netzero or Freedom Pop available in your area?
How short is your budget? How much of a gap do you need to bridge?