My 15 week old baby won't settle in the night

[Amie.lea]

 Just wondered if anybody has any good tips for me... My baby is 15 weeks and I stopped breast feeding a few days ago and stArted him on formula he has had a few bottles here n there in the past so it's not completely strange to him!! He has had a very good strict bed time routine since he was 8 weeks old never been a prob however recently he will have his usual feed around 7 and is awake again at 11. This isn't like him and I make sure he eats plenty through the day so he shouldn't be waking up so early, so I've started giving him water but he doesn't settle at all, he's very fidgity and restless even if I put him in with me he still doesn't settle so I have tried giving him a feed at this time but he's not really interested it can take 2-3 hours before he drifts off again!! Any suggestions would be much appreciated
Many thanks
Amie

[Lolly]

Can you post your day for us please? It is probably a routine issue rather than a feeding issue, once we can see how things are going we can hopefully suggest something!

So..

Eat - what times, how much
Activity - how long for
Sleep - what times, how long for

Laura