Baby introvert?

Hai mommies, first time mom here. Anak saya dah nak masuk 7 bulan but lately makin kerap takut dgn org lagi2 kalau ramai2 mcm tu. Normal ka ya? Even kalau ada family lain dtg kat ruang tamu dia akan takut n eventually dia akan nangis. But bila dah bwk masuk bilik dia akan ok siap gelak2 lagi. Is it normal? Thank you in advance ya.. #firstmom #Needadvice