Hi all mummies n dad

I'm very curious if baby have nightmare?
I recently notice my baby will suddenly scream very loud when he asleep. He only 2 month plus going 3 in a few day. Any mummies have the same problem too?

And also, what your baby height n weight when he around 2 months plus?
People always mistake my baby as a 4-6 months baby. Haha.

Thank all who replied in advance (: