4 month old - I'm clueless!

[Hoaxxchiq]

My son had his third set of jabs on Monday, it's now the early hours of Friday morning!

His sleep pattern is completely messed up this week and I'm usually confident with what I'm doing, but now I'm just fumbling along!

Before the jabs he would go to bed at 9pm and his routine was usually to wake at 12 on the dot for a feed, again at 4am and then when the sun came up.

Now he's goes down at 9 and wakes up at 11. I think there's no way he needs feeding, he's not even fussing. He's just awake and can't settle himself. But giving him a dummy only makes him sleep for fifteen minutes before he's awake again, so I fight with that until midnight or 1am and give him another feed. He sleeps 2 hours and we have the same battle again.
It's exhausting because I'm not sleeping for longer than an hour and a bit at a time and I just don't know what I'm doing.

Also, he falls asleep whilst I'm winding him, and even when I wake him he falls asleep again, so I'm unable to wind him. But this has always been the case, so it shouldn't be a cause for my current problem.

I know he had his jabs on Monday but I don't know if that's why he keeps waking up
He's not upset at all or crying for milk, he's just unsettled and won't fall back into a long sleep.

Could it be 4 month sleep regression and not jab related?
Can't be much help as my dd is only 3months but have heard about 4month sleep regression a lot!

I think the jabs would have caused probs mon and tues but he should have settled from those now. Sorry not much help. My DS is also 4 months but he sleeps 12 hrs through now. He went for a while of waking and wanting his dummy and falling back to sleep and then it fell out and I had to keep putting it back in. He is sleeping better in his own room now and seems more comfy. Is your DS want enough or cold or is there something else that could be waking him? Sorry I'm not much help just wondering if he's waking because if anything else if he's not hungry etc. Sometimes my DS has stirred around 5 and it's as the neighbours are up early and I think he's heard their front door close as he's I the room over our front door next to theirs (if that makes sense).
I'm only awake now as the cat woke me up

Thanks for the advice ladies
I have never ward of sleep regression, but I've googled it and it sounds very interesting!
After this week's events, I decided to try the bedtime routine that everywhere says I should be doing.

So I gave him a bath, read him a story and gave him a bottle before putting him down to sleep, he was out like a light. He went to bed at 7.30, woke at 10, then again at 1am and again at 3.30am
I know this isn't his normal routine, but the point is, he is going straight back to sleep without a fuss!
A complete change from yesterday.
Fingers crossed it works tomorrow night, I shall keep it up and see what happens

As for his temperature. That is a constant battle, as the sun is always on our bedroom window, so the room is 22 degrees, even with the windows open all day. It doesn't seem to bother him though. His neck doesn't get sweaty.

I don't think there's anything waking him up, I always seem to notice noises, as I am a light sleeper. So I notice the boiler switching on and people wandering around the house at night etc