Nope. In fact, not even close to too much, unless the burger was really really big (say... 1/2 pound or more?). In all reality, you probably should be eating just a little bit more.
The disgusting feeling in your stomach can be caused by a number of things. One of those things is an excess of acid. The acid excess can be from your digestive system being activated by some small amount of food, but never satisfied (like an appetizer without a main course - that's why appetizers are served), or it could be from natural chemical reactions of some kinds of sugar with the acids in your stomach forming even stronger acids (sugar broken in half = pyruvic acid, which if not processed with oxygen = lactic acid - the thing that makes your muscles hurt after working out hard).
The disgusting feeling can also come from a minor allergic reaction to something you ate, but if that's the case then it would come every time you ate something that you were allergic to. It doesn't look like there's anything there that is particularly likely to spur an allergic reaction, but if you always feel this way after eating some particular thing, I would suggest studying it out further. A very small number of people have an allergy to gluten, something in all wheat products (for most people, gluten is good. I don't understand the craze over the gluten-free diet - it's more expensive and doesn't do anyone any good unless they are allergic to gluten).
There is the possibility that your yogurt caused it (but it's still an off-chance). Yogurt is milk that has been cultured by a bacterial species known either as acidophilus or primadophilus - both are bacteria that are naturally already in your stomach - and they're good for you, they help you digest food. It's possible that your gastric (stomach) bacterial count is too high, but that's somewhat unlikely.
It's probably the cause illustrated in the 2nd paragraph - the activation and the sugar-acid combined. It happens to me sometimes when I eat chocolate without having something else with it.
