There are several options you have available to you, but the first one is the most important.

If you need help with a domestic violence situation or sexual assault right now call 911, otherwise call the National Domestic Violence Hotline at
1-800-799-7233 (SAFE)
1-800-787-3224 (for TTY)
or visit thehotline.org for direct escape

You can also call the RAINN (Rape, Abuse and Incest National Network) at
1.800.656.HOPE (4673)
or visit their 24/7 national sexual assault online hotline on a safe computer at online.rainn.org.