Help need information about child abuse?

i'm 14 and my parents told me to change to go to the doctors then they said the doctors closed so i don't have to go after i change clothes they yelled at me to get ready to go because the doctor came back and i said no that i didn't want to go anymore, they started yelling at me and we started arguing then she yelled at me to lie down on the floor with my stomach on the ground (this is the position she always told me to go in when i'm about to get hit) she then knelt next to me with a metal fly swatter then started yelling at me why'd i argue with her and i'd respond and she'd yell at me to shut then started hitting the metal part of the fly swatter really hard on my butt about 3 time and told me who here was the child and who was the adult she kept hitting me till i'd respond after taking a couple of more blows it hurt so much i had to sit up and try to get away from her but she kept hitting me till i apologized and say i was wrong, this was always my punishment for talking back or getting in trouble and every time i'd have these big red welts on my but she's been doing this all my life and i'm really scared please tell me if this is child abuse? i'm scared and confuse. my parents feed me and my brother both and we have food and shelter but they're always threatening to kill us when were in trouble or do something bad. I've tried calling the child abuse hotline but no one would pick up and i'm scared of filing a report and they'd find out that i did it that they might hit me again