Hang in there, my DS is 2 and whenever he is unwell his sleeping patterns change and takes time to settle again, even after he is feeling better.

Would your little one enjoy a bit of music or one of those musical lights? The one we had projected images on the ceiling and would play music that you could set to turn off automatically.

Otherwise maybe try the 'shoosh pat'. I loved this one as you can be right there when he needs you but your not looking at or holding him.