You have not mentioned your height and weight. Kindly mention it next time. May be you are overweight
and your fatty food intake has not decreased, that is, may be you are not dieting in spite of walking regularly. You will have to reduce your calorie intake, don't forget that the sugary foods will be converted to fat for storage in the body. Exercise regularly and drink plenty of water, this will reduce your Indigestion
and acidity problem. For acidity, you can take Tab. Pantop 40mg once daily for 2 weeks, half hour before breakfast on empty stomach.