Hi there,
What formula is your daughter on? It may not be satisfying her properly. I found that with my son - he was on SMA and was constantly crying for food, so I changed him over to Cow and Gate, and that seemed to settle him.
The other suggestion is if you wanted to try your lo on the second stage milk, but I would check with your HV first as she may still be a bit young.
Paula - Mum to Thomas