Get a lawyer (it's a lot, but it'll save you money in the long run if you don't have one already), get a paternity test (secretly, you'll be denied sometimes in court if you ask for one, she might fight to get them to say no), and don't pay for anything you don't need to. See if a bro can give you a place for 30 days. Find a studio/room share ASAP and get back on your feet bro. #1 priority is yourself, getting a stable living situation, then everything else.
Avoid too much tuna, you'll get mercury poisoning if you're eating it more than 4-5x a week. You need some sort of fridge. Move yourself in on a buddy's couch or something, tell them what that bitch did to you, and that it's only for a month.
Best of luck and keep us posted.
What part of the country you in?
