Do you eat fish? As mentioned before Rose Elliott does a low carb vegetarian cook book and Celia Brown has brought one out too.
Apart from eggs, there are loads and loads of different cheeses, quorn, quorn mince, nuts and seeds, tofu, soya and dairy products, - you can make sauces and stir fries just let your imagination run riot, how do you have your vegetables just plain steamed or boiled? Make mash out of them and soups, do a wonderful cauliflower and cheese soup, dont let meat recipes put you off, just adapt them by substituting with quorn or tofu or fish, make a bolognese style sauce and use courgette noodles with it, make up a lovely curry with cauliflower rice, read through the recipe thread and the low carb recipe thread too, there is no need to become bored with food at all, get a quorn steak or low carb vegetarian sausages have them with veggie mash, or make ratatouille with that, is all really yummy. Check out these links to give you more ideas.
http://www.low-carb.org.uk/links.htm
http://allrecipes.co.uk/recipes/searchr ... Vegetarian
http://www.low-carb-recipes.co.uk/Chunk ... Chili.html
http://www.low-carb-recipes.co.uk/index.htm
I think you are just a bit thrown and dont know what to eat because it has been drummed into you right from childhood to eat starchy foods, just like the rest of us but dont worry too much about it, you will get used to it and adapt.
Have you got hold of a carb counting book so that you know which foods are low/medium? This will really help you and if you just eat veg and cheese and eggs over and over again then you will need more recipes to alleviate boredom from eating the same stuff again and again. If you have headaches and a funny tum drink more water or even sugarfree squash, you may have eaten high carb veg and not enough fats, maybe this is why you have put on weight? What did you eat before? What was your normal diet like? I am sure you can eat similar things just not the starches, you can make some really nice chips from aubergines for exampe, and noodles from courgettes and so on, there is no need to suffer like you are doing at the moment.
All the best and a big virtual hug to you
Karen x