Salam! Jangan risau, memang ramai mommies yang first time ni confuse apa rasa baby kick haha. Most mums describe it macam ada butterflies dalam perut, or like little bubbles popping, super subtle je at first, so easy to miss! Since you're already 20 weeks, you should start feeling something soon (kalau belum pun, still normal). Try lie down and relax, put your hand kat perut, and jangan expect macam tendangan kuat, awal-awal memang lembut je, macam light flutter or tapping feeling. I'd suggest check in with your doctor next visit dan describe exactly apa you do feel (even if it's confusing), they can confirm kalau it's baby movements or just digestion, doctor lebih boleh advise based on your situation. You got this mama!