13m dd has completely f*cked up her sleep pattern

[chickeninabox]

I'll be brief...

DD had viral infection about a month ago, now a shitty cold with streaming nose, plus teething. Her sleep is all over the place. Tends to wake any time after midnight after a good first few hours and then can be awake from 1-4 hours. Of course this is partly due to her illness and teething but some of it is now habit. How on earth am I going to tackle getting her back on track ? She shares a room and am sure she is also waking the neighbours on a nightly basis.

Actually that wasn't so brief...sorry...just need to vent spleen and see if anyone else is going through this atm.