Seek medical help as soon as possible. Tell the hospital staff what happened.
Make a police report, even if you do not want your abuser arrested. It documents the abuse which may become evidence for future court hearings (such as a custody hearing, assault, battery, or stalking case).
Save evidence such as police reports, medical reports, dated pictures of your injuries or damaged property, names and addresses of witnesses, weapons, etc.
If you leave your spouse or partner, you may need some help, financial or otherwise. There are resources available. Counselors at any of the domestic violence programs or shelters can help you analyze your choices and work out a plan.