Hey Freeflying, how are you doing?
Has anything else happened?
You've done the very best that you can for your DD in making sure she is being cared for in a stress free environment; you're a great mum dealing with a difficult situation, go easy on yourself.
Is there any way you can extend this care should you need it? Take the opportunity to do so if you can.
Please do not be scared about calling the police now that they are involved; they do want to help you but can't if you don't keep them informed about what is going on. In fact they need you to keep them informed so that they can effectively build their case...you're doing them a favour really.
Trust me, they know what they are looking at, they have seen it hundreds of times before and they know when it is a genuine case...yours is.
Please communicate with them and with your friend freely. The moment you can see your actual position and take the support you need, is the moment your recovery begins (and you need to recover from this for your precious DD).
You will get all the support you need (and then some) here, but you do need to try and get your focus back and deal with this head on; that means you have to start looking after yourself properly...eating, sleeping, talking. I do hope you can find the strength to do this.
My thoughts are with you Freeflying and I truly hope you can find the energy to get through this.
You are not alone.