Hi thanks for your question.
The symptoms you have described are eigther of acidic peptic disease or gall bladder
diseases like gall bladder stone
.Acid peptic disease
usually produces pain abdomen,abdominal fulness and vomitting .Pain in armpit could be part of acid peptic disease.The commonest cause of acidic peptic disease is gallbladder
stone I would suggest you to consult a physician who may be able to evaluate you for your symptom.you may need ultrasound abdomen and upper G I endosopy to determine cause of your symptoms
Hope this answers your question.