Have you been injured? Have the police suggested that you be medically examined?
If your dd was present when he assaulted you, the police are duty bound to send a report of the incident to SS who will contact/call on you, most probably sometime during the next week as they are statutorily obliged to check your dd is notat risk of harm.
It's in your best interests, and those of your dd, to ensure he doesnt return to your home before any SS is investigation is complete.
When the police find him they will arrest him and take him to a police station where he will read be his rights and questioned.
If the police decide to caution him and he accepts a caution, he will be released immediately. If the police decide to charge him it's unlikely he will be kept in custody and he will be bailed to appear at the station or the Magistrates Court on a given date. If the police pick him up tonight, he's likely to be at large again either in the early hours or sometime tomorrow morning.
How safe is your home? If he took his keys with him, can you bolt or otherwise secure the main entry door and any other external doors from the inside?
Do you have family/friends living nearby? Is there anyone you can ask to stay with you this evening or overnight?