Below Ground by Ash Ericmore
Carrie is night security at a facility that does God-only-knows what. Her husband is an arsehole. Her kid misses her.
And now she’s all alone.
These things have come from somewhere, and she’s trapped, and alone. And scared. All Hell has broken loose on the surface, and she doesn’t know if she’s the last one left.
She doesn’t know how long the facility will last. How long the lights will stay on. How long she can stave off those things…