Cirit birit memang boleh jadi normal awal kehamilan sebab hormonal changes, tapi kena tengok jugak berapa kali and kalau ada symptoms lain macam demam atau sakit perut yang teruk. I'd suggest check with your gynae to be safe, terutama kalau diarrhea tu teruk or berpanjangan, sebab kena pastikan you're staying hydrated and baby is okay, a few of my mum friends experienced it but their doctors confirmed it was just hormonal.