Hai sayang, normal je rasa berdebar during pregnancy especially kalau HB low, oxygen kurang sikit, so jantung kena kerja lebih keras, tapi confirm dengan doctor sebab kat 29 weeks ni important nak pastikan HB level okaylah. A few of my mum friends had low HB during pregnancy and they all got iron supplements, pastu the palpitations improve, but setiap orang berbeza so better check with your doc for peace of mind and maybe do a blood test to see your exact levels, they might suggest iron-rich food or supplements depending on your numbers!