really need parenting/marital help

Hi. i am just so frustrated and i seem to be taking it out on my 2 yr old son when the one i am really angry at is my husband. my worst fear is abusing my children and even just routine yelling at them upsets me and has me in tears. my husband and i are having serious problems and when something he does upsets me, he goes to sleep or leaves and i am left here with no way to let my anger and frustration out. the one that suffers is my little boy whom i love more than anything else in this world. being a victim of child abuse myself, i catch myself before i can do anything more than yell at him. just little things will set me off. i know this is not right and i can't seem to stop it. any and all advice critical or not will help. so far i have not been able to find a board that touches on any of these subjects. thanks, rosemary