Work place are saying we have to do 2 night shifts every 3 weeks but i find that when sleeping in the day i have vivid dreams and constantly wake up?

It is normal: When you try to sleep for 2 days after 14 nights of sleeping you will not get deep sleep and will have several wake periods and when you wake up in the middle of a dream state you will remember the dreams vividly. When you have a full regular sleep cycle at night you will not remember the dreams as much. The sleep is much more sound.