I can assure you that it is not gastric cancer. It causes severe loss of appetite and weight loss.
Your anxiety is overplaying and aggravating your symptoms.
Anxiety can be helped by;
1) Cognitive-behavioral therapy (CBT) and operant-behavioral therapy (OBT); done by a psychologist.
2) Relaxation training and biofeedback.
4) Acupuncture and acupressure
7) Group sporting activities
8) St. John's wort
10) Valerian root.
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