I am also rather sensitive to protein! I have learned that I must limit mine, so I have just a bit with my lunch and dinner because protein causes my bg to spike more than anything else. The rise is many hours after I eat a big measure of protein. I find having less helps improve the gluconeogenesis that seems to cause that trouble (for me anyway). I am not a true vegetarian but was for years with no trouble. In my life with diabetes I have stayed healthy by following a "balanced" diet. Here are some facts about the necessary protein 'nutrient':
A well-balanced diet provides enough protein.
Healthy people rarely need protein supplements.
Vegetarians are able to get enough essential amino by eating a variety of plant proteins.
The amount of recommended daily protein depends upon your age and health. Two to three servings of protein-rich foods will meet the daily needs of most adults.
Too much protein can also cause problems if you have medical conditions. The long-term effects of a high-protein, low-carb diet is not known..
The signs of too little protein include recent weight loss, tired muscles, and a drop in your muscle strength.
So please enjoy the natural plant protein foods you can add to your vegetarian way of eating. Mine fill me up, taste really good, metabolize without trouble, and give me plenty of energy to get out and goof off.