depressed and angry all the time

Hi,
ive been feeling very angry lately, i get mad at everything, everyone and i have no idea why.. i feel like im at a low point in my life, im extremely stressed out over work, money, husband, child.. i use to be a really happy person who liked going out and having fun but now i hate going out, i feel trapped when im around to many people and it freaks me out.. i just dont know what to do anymore, im so exhausted feeling this way i want to be able to enjoy myself, have fun, be able to be happy like i use to be and not stress out and get mad over everything.
please help ...