Anger and stress. (non rage)

For the past few weeks I've been very stressed with school and work. Today I had no work and I finished my homework quickly because I wanted to play a game or two. First game went great, awesome team we curb stomped them quickly. Should I fit one more in? Sure why the hell not! Get into que had a really good support we stomped lane. When the first lag spike hit I was fine. i was after a 3-1 team fight. When we continued had some more lag but that is normal at 5 pm at my house. Yet I was very angry because we had lost because I couldn't land a skill shot because of the lag. I slammed my fish on my table and sighed. My mom bf (who is jobless) said what's wrong. I think he was a little drunk I think. I said "nothing" quietly. Then he was still looking at me and I stared at him. Then he got up and throw a pillow at me because I was not responding and was wearing headphones what blocked out most of the sound. When he got up he walked to me and grabbed my neck and twisted it into his face and yelled into my face, "you fucking should be respectful to me you punk. I'll knock you out!" I said what's wrong and he said you better be more respectful to me in my face and at stared at him. At this point he walked away and smoked a cigarette but I left with my mom to get stuff for school. In the car I explained it to my mom and she did not respond. Okay here is the problem. I'm stressed out a lot. I have 6 honors classes and a sport. So if I get to play a game I'm lucky as shit much less 2. With all this stress I get mad quickly because I don't have time to fucking deal with people's problems. On a normal night I have 2 hours of homework. But what really makes me fucking pisses off is that he does not create any income for the house. In fact IM THE ONLY ONE. I make about 250 USD a week. my mom can not find a job right now because no one is looking for a home nurse sadly. He was used MY MONEY to get drunk off of. To add insult to injury he broke my laptop that I used for gaming. So.when I.got back home.to see my laptop in 40 pieces snapped like a tree under 400000 pounds. I started screaming and yelling. I walked to my room and punched a whole through my door. Now I'm here typing this on my phone. What I want to know is how can I control my anger so I don't lash out again.

PD I typed this on my phone so don't mind spelling and grammar