DS1 whom is 22 months old, has slept thru the night since he was 11 months old.

In the last few weeks he has been waking in the middle of the night hysterical screaming and squealing. (He is a noisy squealer at best of times. When we go to him he clings on for dear life and doesnt want put down, he will fall asleep in our arms and as soon as you go to move he wakes up and clings on.
If we lie with him on sofa bed in his room, he is up and down and restless and doesn't want to sleep.

DH is away a lot at present which makes it hard on me to have 2 kids waking overnight. Last week I had 4 nights home alone and 2 nights I had both boys in bed with me which doesnt work, as at one stage I woke and DS1 had turned sidewas in bed with 1 leg on DS2 head and other on neck.

Last 3 nights DH has slept with DS1 from when he wakes screaming, but says very restless.

We have tryed as hard as it is letting him scream for a bit hoping he will self settle but he doesnt, if its just a grizzle he will but not screaming.

He generally goes to bed ok without much grizzling.

Please help with any ideas