Hello, Anon. Thank you for posting.
H. pylori is a common type of bacteria that grows in the digestive tract and has a tendency to attack the stomach lining. H. pylori is commonly transmitted person-to-person by saliva. The bacteria can also be spread by fecal contamination of food or water. If you are still this ill, it might not be a good idea to go back to work. What did your doctor say? I would suggest checking in with your doctor, especially if you are having difficulty breathing. This might be a separate issue. We cannot know.
Generally, 3-4 weeks after finishing treatment, a doctor will check to make sure it worked. Depending on your age and other medical issues, your doctor may use a urea or stool test to check this.