Anxious Feeling Before Bad Luck

Before a bad event happens a knot in my stomach appears, even without anything indicating that bad luck will appear. I notice that animals share this same characteristic, as do many others like me. So whether this is a psychic experience or instinct of the animal nature I thought I would share it here.

One experience I have had is when my mother and brother had both been drinking. They don't drink regularly and when they do nothing bad happens and they just laugh, although she had been drinking more since she had caught my father cheating on her with another woman. My sister and I were sitting in our room watching videos on the computer, when I had gotten the knot in my stomach. My mother had gone out with my brother next door.

When I had felt the knot my mother had came in to the house and came in our room. She started yelling at us saying we were irresponsible and how we hated her even though she did so much for us. She then left and me and my sister were very scared of what could happen. My brother had come in about half an hour later and started yelling at my mother, and throwing things around the house. So my mother drove me and my sister to my aunt's home. I had later found out that my mother had beaten my brother.

Has this feeling ever occurred to anyone else? If so please inform me so I can handle these feeling of anxiety better.