Changes in sleep pattern?

[SeptMummy]

My DS is 19Wks and has just started to fully wake up between 4.30-6am rather than his usual 7am start...we're on his third morning of doing so and we're all tired!! He is a very active child, enormously inquisitive and doesn't sleep much during the day. Will sleep on average from 7.30pm - 4am, then BF at 4am & normally goes back to sleep in cot or with me until 7am.(Also, lately he has been waking at 2-3am aswell)
Unfortunately we're in a one bed flat so he is in our room, so leaving him to 'play' in is his cot is rather short lived and I don't want taking him next door to become a habit for him to continuely wake up early?
Any suggestions as to why this is happening or what I can do about it?

Could it be a bit chilly in the flat due to cold weather which mint be waking him up early

My DS went through a stage of refusing to nap like that, he did grow out of it. At the time he was waking up twice in the night for a feed so it was hard going for a while there. Now he is 27 weeks and starting to refuse naps again...... I guess these things come and go.

I would hang in there, my DS did get the hang of napping again and his night time sleep improved with it.

thank you for your messages, think its a phase that is still ongoing, but a little better... 6.30 wide awake now & still with 1 or 2 night wake ups!

My DS is 11 months now and had the same pattern of 5am wakings 2/3 months ago. I was trying to organise day naps and early-to-bed advice in accordance with No Cry Sleep Solution book as I wanted to eliminate night wakings.

Cut a long story short - after a few weeks of this, I threw said book away and started watching DS's behaviour overall, not just his sleepy cues. I realised he wanted one less nap a day and going to bed later than 6.30 (babies sleep 11-12 hours, so putting baby to bed at 6.30pm means at best they sleep til 6.30am!!!). As for night wakings, still have 'em....and now quietly resigned to them too, which helps.