I accidentally ate meat?

So I was at at a restaurant with a friend and I was looking at the menu and was looking for something that didn't contain meat. So I finally found a soup that sounded delicious: Endless cream of broccoli soup and rolls. I had a nice little Caesar salad with it and it was actually quite a good lunch! After I finished and we left, to make a longer story shorter, I figured out that the soup had chicken broth in it! I feel kind of gross now. I don't feel sick or anything, I can't describe the feeling. I just feel ....gross. lol. Does this mean that I start vegetarianism over again after 2 years?!