I may have a possible stomach ulcer, but I don't have medicaid. Is there any way to get on it?

Yes. Stop all anti-inflammatory medications (ibuprofen, aspirin, aleve) and try Omeprazole 20 mg over the counter once daily for 14 days. If no better I would bit the bullet and go in to see a physician. However, if you have any gastrointestinal bleeding--bright red, or black tarry stool--or if you have had appreciable, unintentional weight loss, you should be checked out right away.
Job and family. Services should be able to help you. But you local health department will be able to treat you right away.