As long as there is a support order, you must pay the support. It doesn't matter who the child is living with.
If you have the child an extended period of time, especially if you have her close to 50% of the time, you might file with the court to end the
child support. But until that's granted you're still going to have to pay what you owe them.
You can also file to have them lower the support, since you're not working currently.
Sorry things are rough for you right now....