Let's start with I'm a 16M I come  for the first 11 years I lived with my abusive alcoholic father who would beat women in front of me half to death. I now live with my mother and stepfather. From the abuse of my father I've developed an extremely strong sense of survival, it has also unfortunately assured me never getting to be a child, and made me much more callous to the people around me.

Back to my current situation my mother and stepfather care for each other, my stepfather also has a drinking issue in the sense he can't only have one beer but many. This has resulted in my mother and stepfather having yelling matches every 3-6 months, a few months ago my stepfather hit my door then walked out while yelling "have fun raising your homo son" my mother also has a stupid connection with her dogs, so once the dogs started following his truck she started crying and running after them.

Once she got into her car a sort of fear response ensued with in me I quickly ran to their closet got a handgun and set an ambush to shoot my stepfather. Not long after I heard both my mother and stepfathers voices I came back to my senses quickly returned the gun and hid. 

Any advice on what to do now?