Hi , I Am A 26 Year Old Male. I

Hi , i am a 26 year old male. I have for the past one year battling severe mood swings i haven't yet consulted a psychiatrist due to family constraint and some other reasons too. I tend to get very negative thoughts very often, i get angry at very small things and later feel very sorry for myself for getting angry, this behaviour happens very often. I am not able to concentrate on any thing, i had to quit my job i feel very worthless of myself. I tried indulging myself but that didn't work. Earlier i use to think of it as a normal behaviour but now it happens very often , one time i feel good and suddenly i feel very depressed about myself the very next moment.i don't feel like talking to anybody. I sometimes remain locked in my room for hours and hours. I really need to be happy as i used to be. Am i bipolar? Or is it something else.