Nanny Needed

We are looking for someone to take our youngest son who is 2. 5 overnight in their home. He has been having serious difficulties sleeping through the night, resulting in sleep deprivation for his siblings as well as the parents. It has been a rough 1 1/2 years. We do have a sleep study due for mid December, however in the meantime the parents have been struggling to maintain day to day. Any advice or guidance would also be greatly appreciated.