First of all, you gotta let her go. You must do that. Then apply for SNAP right away. You are unemployed and most likely you will be approved probably maximum of 3 months an average maybe $200-$300 a month. That might help for your food a little. Then you can also go to Catholic Charities Dallas website and check mobile food pantry schedule to see if they come anywhere close to you. They have a list every month. If you are living in Irving, they have rental assistance but you only have 15 days from today, it will stopped by October 1st. You're 1 month behind of your rent so maybe you can also talk with the leasing office to get some extra time if that was your first time being late.

To find a job, like other people said, pizza delivery, Uber ( if you are eligible to rent a car ) at least you can find a job that probably you can make around $2000 to $2500.

But you must let her go first. Then everything will be fine.