Mamas I need home remedies for ants! We believe a baby mouse had died in our ceiling (our ceiling in…

Mamas I need home remedies for ants! We believe a baby mouse had died in our ceiling (our ceiling in the room is foam so we can lift the foam and see all the wires. above. I'll post a pic in comments to make more sense) and of course ants have come in or their coming in due to it storming here. We dont have money for an exterminator to come right now but we need at least need the ants to die. Any home safe remedies to spray up there? Kid and pregnancy safe!