Aww sayang, muntah dan cirit birit at 21 weeks memang boleh jadi, tapi kalau perut terasa tak sedap gini, better check with your doctor or midwife cepat-cepat okay, bisa jadi gastro, bisa jadi something pregnancy-related, or bisa jadi hormones pregnant mood yang main-main. A few of us mums went through the same thing and turns out it was just a bug yang passed, but some needed proper check-up to rule out anything serious, so jangan ambil risk dengan first pregnancy ni! Let me know how it goes, sending you lots of rest and clear guts vibes!