@Grivusangel -- College student, right? Honestly. You can't make a complete change in your diet like that without doing a lot of research. I decided to go mostly vegetarian several years ago, and I started with a dietician. I didn't know how to eat veggie, and had to learn.
Anyway, I do eat fish now and then, along with eggs. It's just not easy to get all my nutrients only from the plant kingdom. I spent a week at The Farm in Summertown, Tennessee, to get a feel for how they eat, since they're all vegetarians, and I learned a *lot.* Since they do a lot of communal cooking, they add some supplements to their food, like B12 and Vitamin D.
I always know when I'm low in Vitamin D because I start feeling draggy. A couple of days on supplements and I perk right up.