I have a pregnant stray about to labor and unsure what to do with her

Hey guys, I'm in South Nashville right off of Nolensville and Old Hickory. I found this stray that I've been taking care of for a couple days and I fully intended on taking her in for a spay/abort but I think she's about to labor either tonight or tomorrow. I've reached out to a couple rescues but most are at capacity, and I have a feeling that a mama with fresh kitten rather than a relatively easy spay/abort just adds another layer of complexity to the issue. If anyone has any advice or knows of someone that has experience with mama cats and kittens I'm getting pretty desperate. She's so sweet but I already have four cats of my own. EDIT: I have gotten her placed with WCAC, thank you everyone for all your suggestions and kindness.