Oh, first pregnancy memang macam ni, ramai yang baru mula rasa movement lebih lewat sikit, around 20 weeks ke atas pun masih normal, especially bila kita belum tahu exactly macam mana rasanya. Sometimes it feels like a light flutter or "butterfly" feeling yang kita ingat angin je, so maybe baby dah gerak tapi kita tak sedar lagi. Since you are getting closer to that milestone, it is always a good idea to mention this to your doctor or gynae at your next visit, just so they can check and put your heart at ease. Take care, and congratulations on your first pregnancy!