I'm afraid someone dangerous is looking for me?

I have every reason to believe that there is a woman looking for me. The only way to explain the severity to you is to tell you the scenario. I am 31 yrs old, a single mother with a 3 1/2 yr old son. I made the most immoral and unethical decision to fall in love with a married man that I have known for 11 years. I have met his wife a few times, yet this was before the affair. What I do know about her is this: this all may sound dramatic, but these are the facts...she has family in sicily. She is 100% Sicilian. She knows no other way of being but "harsh" to say the least. Her husband, the man I am incovievably in love with is actually physically beaten by her. (Please just trust me that these are facts, as I don't want to take up so much time proving it) She found out about us three days ago. He was at my house and when he got to work she spit, hit, kicked, all of the things that a woman may actually do if she found out that her husband was cheating, yet this is not abnormal behavior for her, It is actually quite the norm. As to why he hasn't left her thus far is a whole other story that isn't geared toward my question. I Have not heard from him in three days (it's never exceeded a whole day before) I used to work where he does, and I called an old friend that still works there and he hasn't been there since that night. And he NEVER misses work. EVER. Like I said, her family is sicilian, and yes, they will not hesitate to brutally beat someone to the point of near death, or maybe even death. If she finds out where I live I KNOW she will do "her best" on me. In saying this, I understand that some of you may start the "well you should have thought of that before you cheated" or "you did this to yourself" I agree with ALL of that. That is not my question. Mine is, what has to happen or what can I do (if anything) right now to protect myself and my son. I have no doubt in my mind that her brothers and father are not doing what they do best on her husband as we speak. She does not know where I live...as far as I know. Yet, how easy is it to find me? She knows my full name, but that's it. so, my questions are what can i do to protect myself and second, how easily can someone really find someone these days? Thank you, and please, i beg you, no mean answers. I just need help. I made a huge mistake and now I am incredibly afraid for my life.