My little one was born between 75th and 50th percentile of weight(3.15kg) when she was 3 months it dropped to 50th, now she is 5 months and it has come within 50th and 25th percentile only. She does not sleep alot. Any suggestion to increase baby weight?

Does your baby drinking well? If you are concerned with baby's weight, you might want to discuss with baby's PD if it is feasible to start weaning earlier, 5months old. Personally I feel it is quite normal for baby to drop weight once they start to learn to flip, to sit or to crawl as they burn more calories. For the sleep issues, is she having short naps interval? You might want to try to consolidate the nap into 1 longer nap. You can read up more from here: http://www.babysleepsite.com/baby-naps-2/short-baby-naps-explained/