She's doing well.

At birth 3.1kg today's immunization 5.6kg she is 14weeks

Thats means you have not not been feeding ur baby adequately. A baby should be fed every 2 hours max 3 hours and u empty one breast before putting him to d other one. In addition, make sure u are eating healthy meals. Breastmilk is d best for ur baby in d first 6 months of life. After 6 months, u can introduce supplementary food. What's his/her birth weight and whats d weight now? All d best!