My son, the alarm clock

Every morning at or around 5 AM, my son wimpers in his sleep and it wakes me up. I think he's just looking for his pacifier, cause he doesn't stay awake (99% of the time), but it wakes me up. Usually, I go back to sleep, but lately I have been lying in bed thinking about all of the things I have to do in the near future. I'm stressed out.