Congrats, mama! At 31 weeks your baby boy should be around 1.5 to 1.6 kg na, so laki na talaga, he's mostly just going to gain weight and develop his lungs from here on out. A few of my mum friends said their babies felt super active and strong around this time, kaya feeling mo siya sobrang dami ng movements, totally normal yan! How's your energy holding up? The third trimester can be draining, pero you're doing great!