2yo sleep gone wrong - help

hi all,
is anyone else's almost 2 year olds having sleep issues? My son used to sleep really well both day and night and then over the last 6 months things have gotten worse and worse. The last week he has been waking every few hours and just screaming.

What he does is wake up crying and calling mummy, daddy etc. We go in and say 'it's ok' etc and then he would settle down. Sometimes you'd have to be firm and say 'go to sleep' and he would, but now neither of those works and he will only stay quiet if we stay in the room with him. This is not really what we want to be doing at 10, 12, 2 4 and 6 am.

We have a 7 week old baby but he has adjusted really well to that and has not shown any behavioural issues during the day. And the sleep probs are well before baby, just getting much worse now.

We have tried not going in at all but he just screams and screams for ages and gets so worked up he can't calm himself down. We thought he might be having nightmares and tried a nightlight - no change. We've moved bedrooms, no change.
He still has good sleeps by day 1 x 2-3 hour sleep and goes down happily at 7pm. He is still in his cot, we have his big bed in there and have thought about trying that but thought that it was best to wait till his sleeps were better (maybe in 12 years).

So...has anyone had experience with this or can recommend a good book or plan of action or toddler sedative (only half joking).

yeah ...ty ends up in our bed he sleeps in longer too so its not too bad.......also have you considered teething...i forgot all about the 2nd molars until ty opened his mouth and then i found one coming thru.......which is why i felt like nearly killing him this week

good luck with eveything......my boy has never slept well so after 2 yrs im getting use to it..hope like anything that mia isnt the same

My DD's sleeping improved vastly when we moved her out of her cot and into a big bed. We coincided the move with a rigid bedtime routine. Now at 7pm it is pj's, teeth, into bed, book, lights out and that's it. For the first two weeks if she woke in the night DH or I would lay on the trundler bed in her room, but then I realised we were creating a habit, so one day I said to DD, 'if you wake tonight Dad or I will stand outside your door, but we won't be laying on the bed anymore'. She accepted this and woke the next couple of nights and we stood at the door and after that she has slept 7-7 every night! She occassionaly has a dream that wakes her but this is rare. I would recommend the move to the bed, and remove the cot altogether. Be rigid with your routine and don't fall into habits which you don't want to continue long term.