Libby
When she's come back from the party, had a night's sleep and is calmer, you need to talk about this with her. At 19 she is an adult, so maybe tell her how concerned you are about her behaviour, that you care about her and want to make sure she is OK.
You cannot contact the university on her behalf, as she is an adult, they cannot discuss her with you without her prior written consent. Even with this, they may prefer to have her present in any conversation with you.
If you want some advice, however, please call the university and have a general chat with student services - they will be able to give you some information on a general level without compromising her right to confidentiality. Don't contact her tutor - they are not trained to assist in complex pastoral care. Once you've spoken to the university, you can discuss options with her.
It's really common for first years to feel overwhelmed and at breaking point at this time of year. University stops being fun right around now - deadlines, module choices, friendship groups collapsing, running out of money, etc. Your daughter isn't alone in feeling overwhelmed, and the vast majority of students make it through!