Any noise from her tonight? Fingers crossed. As a last resort you could try one of those humane mouse traps. But I think you'd need to sit up all night so you could let her out as soon as she went in it. I think it's a bit stressful for them being in the trap too long. Local hardward stores should have them - like this
https://www.amazon.co.uk/Pest-Stop-T...ane+mouse+trap
You put a couple of hammy chocolate drops, or cucumber or whatever at the very far end and the door closes behind them.