A negative result can mean that you are not pregnant, you took the test too early, or you took the test wrong. Pregnancy tests vary in their sensitivity (how soon they can detect the hormone hCG), and you may not have given your body enough time to produce enough hCG hormones that will show up on the test. Also, if you let a test sit for too long (after the instructions on the box tell you), the test is invalid.
1 Certain types of food are known to cause flatulence and bloating. 2  Foods that are high in carbohydrates and starch such as beans, cabbage, broccoli, white bread and refined flour can result in an excess of gas trapped in the digestive system.3  Many of these foods can cause exceptionally foul smelling gas as well. Many of these foods can cause exceptionally foul smelling gas as well. 2  Foods such as red meats (especially ground beef) and fatty foods release gases such as hydrogen, methane and carbon dioxide during the digestion process.
The sulfur-rich foods most commonly associated with foul-smelling flatulence are eggs, meat and cauliflower. Cruciferous vegetables such as broccoli, cabbage, kale, mustard greens, collards and Brussels sprouts are also high in sulfur and can cause smelly gas.airy products can also cause smelly flatulence if you have problems digesting them, particularly those with a high sulfur content. Avoiding problematic foods can often help eliminate the issue of smelly flatulence, but if the problem continues it could be the sign of a digestive problem.