hello to iwantasecondone and holidaysqueen...
iwantasecondone- is your baby 8/9 months as well, then?
was wondering whether he would possibly benefit from a big bottle feed (expressed, or formula, don't know what you would use) just before bedtime, just to really fill him up?
i was bf my little girl every 3 hours up to 4 months and it was doing my nut- was told by paediatrician that she was just 'an extra hungry baby' and needed more cals than most. Couldn't physically keep up with her needs. Turned to bottle feeds (expressing, then eventually formula as her demand too high) and she settled immediately. Slept through night 12 hours. She was just peckish, apparently :-)
if he seems healthy and happy to you, i wouldn't worry too much about centiles and growth etc...they are just guidelines. some babies just stay skinnier and are 100% fine with it.
when i had feeding issues with mine, i took her to st.marys paediatric dept for a one-off check-up as a private pt (my gp was shite and no one in the surgery knew diddly squat about small babies)...the paed lady was awesome- answered all my qu and alleviated all fears. was in there for nearly 2 hrs.
hope this helps.