Fear and Suspicion

So I literally just walked into my house and the door was left open and no one is home. The lock was locked but the door was open and I'm a little freaked out. My mom just told me last night that there have been robberies around were I live. I thought I just heard a noise just a minute ago too. I called my mom's cell and left her a message. It really makes me think about how I should probably be prepared for situations like this because it could happen to anyone. I have always had a fear that someone would come into my house and kill my family so that doesn't help the situation at all. I think I'm going to call my mom's t work number now to see what I should do. All I know is that I'm not going upstairs!-Lexus