Alah, tu normal je sayang! Fourth pregnancy, badan kita dah kenal siapa ni hehe, kebanyakan mums yang dah beranak banyak boleh rasa movement lebih awal sikit, maybe around 14-16 weeks. The palpitations when lying down tu boleh jadi sebab perubahan hormone dan blood volume yang meningkat, especially when relaxed posture. A few of us tried changing position or minum air sikit-sikit, and it helps! But if it becomes too strong or come with shortness of breath atau dizziness, then do mention to your doc at next visit la.