Hi all
I really need your help with my 4.5 month old DS.
He has never been a great sleeper - naps have been virtually non existent but at least I had the comfort that he would get a reasonable amount 9/10 hours overnight. Until now.
His bedtime routine has been in place since about 10 weeks and from 12 weeks he was consistently going down by 8, wake or dream feed around 10.30 and then another brief (30 mins) wake up anytime between 1 and 3am and then up for the day at around 7.30am.
Once this seemed sorted (!) I concentrated on daytime naps and managed to get into a semi routine of 45mins/ hour in his cot around 8.30am, in the pram for an hour + around 11am and then another 45min/ hour nap in the pram or sling around 2pm.
but now his nighttime sleep has gone haywire. He is getting later and later to sleep and is waking more in the night.
Last night he didn't go down until after 11pm (we started bedtime at 6.30pm) - he screamed the house down. Woke at 3am, fed for half an hour and took an hour to settle then woke at 7. So he got about 6.5 hrs sleep. The most he gets in a day is about 3 hours - this isn't enough is it?
Right now he is refusing his 8.30am nap. He is just moaning. I am leaving him to it though as I am exhausted.
He is BF but since 6 weeks old he has had a bottle of formula at 7pm. For the past couple of weeks he has been unhappy taking the bottle (which has previously been fine) and will only settle after having boob 
I feel utterly trapped and disheartened. I have a night out soon (my first for two months) but I just won't be able to go if he carries on like this. Plus we are going to my ILs for Christmas but I don't want to go if it means me having to deal with DS in this way.
Why won't he sleep?? Where can I turn for help? Will HVs be useful or just read from a sheet like mine seem to do?
I am beginning to think there is something wrong with him.