Biasa je, baby banyak kali membengkok-bengkok tu part of their natural reflexes masa kecil-kecil, tapi since your little one still very young (baru 7 weeks!), I'd say observe dulu, check if dia comfortable, feeding well, dan normal development lain ada ka. Kalau worried sangat or ada yang nampak off, baik check with your pediatrician just to be safe, they can ease your mind faster than forum je! You're doing great by paying attention to these things.