Can i get my baby to see a paediatrician

My baby has been crying very badly ever since she was born and now she turned 6 months old and still crying but got extra screaming. At times I don’t know if my baby is developing normally like other child.. because i still need to rock her whenever she wanna sleep and when she’s crying+screaming, she won’t drink her milk at all. I still have to carry her and she can’t be alone on her own. How to know if my baby doesn’t have a mental problem?? #1stimemom #firstbaby #pleasehelp #worryingmom