Would I be considered overweight or heavy?

I'm 5'5" tall and I weigh about 113 lbs. I used to believe I was at a relatively healthy weight and I eat well. I'm also a vegetarian, so I'm very wary about getting the proper nutrients that I don't get from meat. But these days I've been feeling horrible about my self image and I'm wondering if my weight is considered heavy for my height? If so, what can I do to change this?