How to control anger?

I have a really bad temper and if people come at me attacking me like I did something wrong I can't seem to control it and I go crazy. My auntie recently passed away which is affecting me so much and if people come at me like I'm a bad person I tend to snap and can't let shit go. It's been hard for me to just let stuff go but I don't wanna be this type of person anymore I tried talking to a counselor didn't help.