Bad title but couldn't think of a way to describe this question but here goes. Have you lost a pet, then gotten another one and have them do some of the same stuff that happened when you lost them? Here is my example
When I lost my last Dane, we were asleep on my bed and she started to have what i thought was some strong doggy dreams which was a normal thing, but the sound she made and the way she moved was off and I knew that this was her last day with me.
Back to now, With my new Dane when she is sleeping next to me and starts the the hard kicking while she's dreaming it instantly wakes me up no matter how deep or hard I'm sleeping and I automatically reach over to see if she's okay and to wake her to double check on her. After all of that it takes me about 15 to 20 minutes to fall back to sleep. Hope this helps to kinda explain the question