Baby 4 bulan tak berak seminggu

Hi semua. Saya nak minta pendapat, baby saya nak masuk 4 bulan. Active, kuat senyum and suka main. Susu pun so far okay. Tapi dia dah seminggu tak berak. Fully fm, saya dah 4 kali tukar susu still sama, senaman cycling pun hari2 saya buat. But still, baby still taknak berak. Should I take him to clinic? Minta pendapat semua and I share my lovely little angle photo 😘 tqq