I am 69 years old female who has loss of appetite for the past 8 months but I have not loss any weight but now for the past 3 days I have been vomi?

Go see your doctor. Loss of appetite, and now vomiting is not a normal sign of health. Not knowing any thing about your hx, its time to see your doctor @ age 69. He/she needs to eval you and check labs, and cancer screens. You might need a GI referral for an evaluation.