My 4 month old daughter won't sleep for anything longer than 45 mins at lunch time. She never has. She also has a nap of about 45 mins in the morning (both naps in cot. She won't sleep properly in buggy). It's always 45 mins, exactly. She's going down within 1/2 of feeding, feeding well but wakes still tired and grumpy causing her to nod off and have a poor breast feed at about 2pm. She's on solids 2 times a day as she is a really hungry baby but is still waking more than once (frequently about every 1 1/2hrs from 1am - she also has formula at 10:30pm). GF doesn't help. Any suggestions???