For the past 2 weeks my 10.5 mo who previously slept through has been a nightmare. He goes to bed at about 6.30/7 but is now waking at around 3.30 and will literally be awake for 2 hours crying. If I offer milk he takes it and cries when I put him back down. If I rock him he cries. If I stay by his cot and pat him he cries. If he comes in bed with us he cries. Eventually I manage to rock him back to sleep but only because he is so exhausted. I'm certain he's not in any pain from teeth or similar; I've given neurofen and anbesol and it's made no difference. I'm also not convinced it's separation anxiety as he goes to sleep happily on his own at the start of the night.
At this point I don't really know what the hell to do but I can't go on like this.
Would be really grateful for any tips or experience.