My 22 month old DS has just started waking at night. He used to be an unreal sleeper, going from 7pm-6 or 7am. He has had a nasty cold for the last 3 weeks and is finally better but he wakes around midnight and screams / throws weird tantrums for a couple of hours and then goes back to sleep but wakes up and whinges until morning. With both hubby and I working, we are utterly exhausted. I don't know if they are night-terrors or what?

Is night waking normal at this age and do they ever get back to their good sleep routines? I'm exhausted! He has just started stringing words together so maybe developmental?

Any advice would be GREATLY appreciated