Wa'alaikum assalam! Wow, three months postpartum and pregnant again, that's intense, mama! Honestly, few of my mum friends went through something similar, and they all said the exhaustion was real because your body hadn't fully recovered yet, plus breastfeeding while pregnant boleh jadi challenging for some. Definitely check in dengan your doctor to make sure you're getting enough support, nutrition, dan rest, lagi-lagi dengan baby yang still so tiny. Take care of yourself, okay?