How do you know you have parasites? Unless you've been diagnosed by a doctor. Parasites normally don't inhabit the stomach, they inhabit the intestines where food has been sufficiently digested such that they can digest and/or assimilate it with a minimal energy expenditure. As Spraynwipe said, you'd be wise to see a doctor regarding your illness(es) and get an appropriate prescription. No one on these forums can diagnose you or solve your problems, you need to seek help from a medical doctor.