Please help

Well here it goes. I have been a nurse for just under a year now and for the most part I have enjoyed it but I have been very stressed out at times to. The problem is I was started on 3rd shift on an alzheimers unit which only has 14 Residents. I know my Residents very well and know when they have medical needs. The problem is, they have been pulling me to cover other halls, where I don't know the patients and I am concerned that my assessment skills are not where they should be. Does anybody have any suggestions on how to develop my assessment skills? I would be greatful for any help.