Airporto, what you have described sounds like a very distressing experience and I hope that, in addition to lodging a complaint to the police, you consider perhaps seeking support from your university's counselling service and/or an external service that provides support to victims of sexual assault.
I am in Australia and would not know what actual services are available elsewhere but I am certain that there would be services, helplines, online services and other forms of support available in the majority of universities and communities for this sort of thing.
Services that help victims of sexual assault or harassment would be able to provide you with wellbeing advice but also legal advice I would think. These services would be confidential and staffed by experienced and trained social workers or counsellors or similar. Many of these you can access online if you need to...
I am very sorry that this has happened to you and hope that you are okay.