I am sorry to read that you are in such difficult circumstances at the moment.
However, in my own practice, I have found that all of my own suffering has been a great opportunity for insight, or at least motivation for practice.
My thoughts on the matter are:
1. Are you safe? Out of compassion for yourself, if you are in danger of harm, you should remove yourself from that danger.
2. You have already acknowledged that you may have acted unskillfully. It is worth reflecting further on the cause and effect elements at work here. Great insight and opportunity for further insight.
3. It is worth reflecting that it is hard enough for us to make changes in ourself, let-alone attempt to change others.
4. While we may attempt, out of compassion, to help others, without the wisdom to succeed, our efforts are likely to be wasted.
5. A good basis for action in the world are the Four Sublime States (http://www.accesstoinsight.org/lib/auth ... el006.html
): Lovingkindness (Metta), Compassion (Karuna), Sympathetic Joy (Mudita), and Equanimity (Upekkha). I have found the cultivation of these states of mind extremely useful for reducing suffering and improving skillful action.
6. As a first step to lovingkindness, it is important to acknowledge that, just like you and I, all unenlightened beings seek happiness and freedom from suffering, but they deluded about how to achieve it.
I am unsure of your current practice and understanding of the dhamma, so I'll stop there.
Also, I've only just joined these forums and I'm a bit rusty posts such as these.