Hopping jobs everytime?

Hi, i need help. I recently changed to a new dept and things started getting messy and stressed. Prob is, this is not my first dept and i've been working in other depts before coming here. So this field is totally new, i'm so inexperienced, and i get screwed from my boss everyday! That keeps me thinking that i'm really inefficient running my job and i feel so stressed and unhappy eachday when i think about work. Yet my work has to be done because i'm currently sitting on a high profile place. Here lies the prob...i want to quit. I've found out that this is not what i want and what's the use of tormenting my life with something i dislike, yet cont working with an excellent boss. The administration has started labelling me as a 'grhopper' and i just feel i need a chance to find a place i really like to work. Pls help.....it's either i feel really stressed now, or i've made a wrong choice but can't quit.