Wa'alaikum assalam! Lilitan kepala 37.7cm kat umur hampir 3 bulan tu dalam range normal je, tapi sebab ni concern paediatrician, I'd suggest check with your baby's doctor at the next visit or call the clinic je untuk peace of mind, they boleh compare dengan growth chart dia and make sure everything progressing well. A few of us mum friends, mmg ada yang anxious about measurements ni, but doctors always say as long as baby active, feeding well, and hitting milestones, usually OK je. Take care!