It was normal for me.
I think I was in so much of a fight/flight mode in the first few months that when I did finally sleep I didn't remember my dreams, and I am betting they were of happy things to give my brain a break.
I started having the nightmares at about 4-6 months, they were really bad for a 2 week period, waking up my H nightly sobbing in my sleep. I talked to my Dr, and switched up my bedtime routine, and took an ativan at bedtime, this allowed me to fall asleep easily, and calmed my mind. I never remembered my dreams when I took it, but I woke up feeling totally refreshed. I was UNWILLING to take Zolpidem, or Lunesta, as I had seen the crazy stuff it made people do while working in the hospital.