If you haven't been tested with H Pylori, you should check with your doctor and have some tests run, and then everyone in your immediate family. My wife had the same symptoms that you described. Last year she went to a doctor and was diagnosed with H Pylori. She hadn't been able to eat green veggies and would throw them up between 1hr and 2-3 days of eating them. It escalated until she couldn't eat hardly anything without getting sick, and thats when she finally went to the doctor.
She took the antibiotics and the test results said that she was free of the H Pylori virus. However, I may not have been. It can spread through kissing and other contact with those around you. So, a year later, the two of us are having the same symptoms you describe. I don't want to make light of the subject as it is quite serious, but I am surprised none of our neighbors have complained as to how bad our house can smell. I feel awful all the time, and we can't dare have anyone over for meals or hanging out (not for fear of spreading H Pylori, but out of shear embarrassment).
Anyway, H Pylori can cause ulcers and even stomach cancer if untreated. The vomiting and ick that you see when purging your stomach contents stems from the bodies inability to digest the food caused by the H Pylori secreting an enzyme to neutrilize stomach acids. I don't know all the science, but I am sure there may even be cause and effect from the H Pylori thriving in a sulfur rich environment or oxygenless environment. Hydrogen sulfide, the rotten egg gas, is the byproduct of bacterial breakdown of organic matter in the absence of oxygen. So I wonder if the H Pylori constricts or even thrives on the oxygen rich blood in the stomach, so the bacteria in the stomach begin to produce the hydrogen sulfide. Worth a science wizard to look into and write a paper on.
For what it's worth that is my two-pennies. All I know for certain, is that my wife and I have to undergo the treatment for H Pylori at the same time or risk getting it again. And I do not, not ever, want this foul beast to return. Until it goes away, I will watch the world from indoors.
Oh yeah, H Pylori can thrive in your stomach for long periods of time. My wife couldn't digest green veggies for almost 7 years before it escalated. I on the other hand, have had the unluck of getting hit with this stuff like I have had it for over 10 years. Who knows, maybe I have.
Hope this helps.
~Rin~