Don't know what to do now, advice? (details inside).

As some of you may know, myself and my family have been victim to domestic abuse through my father for a number of years now.
I finally did something I’ve been wanting to do for a long time, and yet couldn’t bring myself to do… I phoned the police.
It’s currently past 1:30 in the morning here. A few hours ago, my parents starting arguing downstairs and I heard shouting and crying. I heard all of my siblings shouting at my dad to stop, and I dialled 999.
My father is now in the police station, and won’t be home until at least the morning. I have college tomorrow, and yet I’m unable to sleep. I don’t know how I’m going to get through the coming day, I can’t afford to not go either.
I feel weird, and I guess I just want someone to point me in the right direction of what I should do and how I should cope with all of this.
Thanks jellies <3