I hope you are leaving in the morning.
Neither of you did well this evening, and you can't let the relationship continue or it will get much much worse.
I hope you are ok after the punch, as well. Did you lose consciousness? Are you bruised?
Get seen by a doctor, preferably at A&E. It will be recorded if you need it for a divorce or a police report.
Also ring 101, but preferably the local DV unit, if you are not in immediate danger. They will advise you and record it.
Finally, do contact Women's Aid. Check their website and resources. They can give lots of advice, including local solicitors and how to stay safe.
If it gets worse, you can get a free emergency injunction application through NCDV.
Finally, unless you threw the actual glass right to his face, he overreacted massively in punching you, so it can't be considered self-defence.
If you did throw the glass (not just water) at his face, then you do have to take stock and work on yourself, but don't stay because of your role in this. It is and unhealthy relationship if violence enters it, and you should leave it, regardless of who was violent.
Fingers crossed for you. Don't let him bully you nor sweet talk you into getting past this.