My 2 month old daughter is drinking 1 oz at a time ever 2 hours and no breastfeeding. she tickle cough 5-6 times a day.is it normal or need to worry?

Calories taken in: are ounces of formula times 20 calories per ounce so she is taking 12 ounces which represents 240 calories. Assuming she weighs about 3 kg her caloric intake is about 80 calories per kg per day which is ok. A tickle type cough is nothing to be worried about. Better still is to see how many wet diapers she has in a day. If at least five then she is getting adequate fluids.