So my baby turns 5 months next Sunday and he does okay when he sits but when I try to sit him up he leans forward a lot and his head goes all the way forward and just stays there?... is that normal??? He shows signs of wanting to sit tho like when he’s laying down he’ll try to get it up and lifts his head and does that too while he’s in his infant car seat. Not sure what I should do to help him get stronger muscle to sit up straight. Any suggests is appreciated.