I know this is just another phase but as I'm sitting here feeling insanely sleep deprived I just need a little reassurance that this too shall pass.

DS is 10 months old and for the past month his night sleeps have completely changed and he is very unsettled through the night then waking up with the sunrise between 4.30 and 5. It started when he was cutting teeth which is understandable but it's still going. Basically he goes to bed at 7 will sleep for an hr then wakes up screaming. He will not resettle in his cot at all so I usually cuddle him till he is in a deep sleep and put him back down. This pattern continues until around 10.30 when he gets really upset and I am up with him for a while (and he has taken to wanting a bottle at this time) When he falls back asleep I go to bed as well and on his next wake up (usually 2 hours later) he comes into bed with me. At this point I stop checking the time- he wakes frequently but at least I don't have to get up then come sunrise and he is awake and there is little chance of resettling him. On the odd morning I get lucky and he will resettle and sleep till 6 but the lack of sleep is starting to catch up on me. I can't help but worry that maybe I have created a rod for my own back by rocking him to sleep but prior to this he could settle himself and was mostly sleeping through the night. He eats plenty of solids through the day so I don't think it's hunger, I've tried dressing him warmer and cooler to see if it's a temp thing, I've given him pain relief incase it's teeth etc but nothing makes a difference. I'm going of get the back bedroom windows tinted to see if it helps with the waking with the sun issue but is there anything else I should try? Or do I just need to keep reminding myself that he isn't going to be a 20 year old still needing me to rock him to sleep