It's fine to be a vegetarian breastfeeder - there are loads out there. I can't really help as I eat fish too, so am not a vegetarian, but just think like this: in India, loads of people are vege and they all breastfeed just fine.

If you can eat nuts and LOADS of iron-rich foods like spinach and apricot then you'll be fine, as will bub. When you BF your body becomes super-efficient at taking the nutrients into your body and milk so you'll be at your healthiest ever, no matter what your diet.

Best of luck to you.