Assaulted - punched in the stomach when pregnant

I’m hoping to get some advice.

I work in a supported living service with young adults who have extra needs. I was out yesterday with one of them and he completely lashed out in the middle of a shop and punched me in the stomach multiple times. I’m 32 weeks pregnant. There is no risk assessment in place for me to work with this man, although the past 4 weeks he’s been showing more behaviours of concern. I called the police straight away and they suggest I press charges but I don’t know where I stand or what to do. My baby is okay. I don’t want to return to work pregnant, but I don’t want to lose my job? Should I press charges?