Welcome, Essence, to SR.
What you describe doesn't sound strange to me--I used alcohol to sleep and to cope with ongoing minor irritants, among others, and without it I find those especially hard to deal with nowadays. My anger issues are farther in the past, and I don't know anything about what to expect with the length of sobriety you have.
For what it's worth, not letting your body get stressed can reduce the level of anger you feel, but it won't--in my experience--take it fully away. This includes sleep, eating well, and exercise--the basics. And when you do get upset by something, find some release--I find a heavy bag useful.
I'm sure others will be along that might help you better, but have patience. It's that time of night not many are here--should pick up in a couple hours.
Welcome, again, and stay around some, you'll find a lot of support here.
Take care,
-TB.