Do you also tend to produce saliva and get a fluttering sensation in the stomach at the same time you are nauseated?

The pancreas may be restricted in the amount of acid neutralising bicarbonate it can deliver. Fortunately the duodenum can produce some of its own bicarbonate through the Brunner glands and bile also has an alkalising effect. If the chyme remains to acid to enter the intestines then the duodenum will reflux it back into the stomach. The movement of bile and pancreatic juice into the stomach is called duodenogastric reflux or bile reflux. This probably happens in all of us to a small degree, but usually not enough to create any problems. In excessive duodenogastric reflux the lining of the stomach becomes irritated and inflamed (gastritis), and the contents of the stomach can then reflux up into the lower part of the oesophagus, irritating that too (oesophagitis). These changes give rise to the discomfort or even pain and nausea. Note that; the same symptoms may arise if the pyloric sphincter isn't operating properly.

You may have a reaction to one of the ingredients, maybe egg protein??

If the recipe doesn't agree with you then you should stop but I guess you have already worked that out for yourself. You may need to change the source if the ingredients and make sure that all the egg white is removed. There are plenty of other recipes to choose from.