Aiyo, at 26 weeks memang badan tired lebih sikit lah, tapi kalau rasa lemas sampai begegar and tak lapar tu kita kena perhatikan sikit, bisa jadi anemia or blood sugar drop, especially kalau ngantuk tu extreme. Few of my mum friends had the same thing and turned out mereka kena top up iron or need to makan more frequent smaller meals, one swears by keeping snacks by her bedside. I'd suggest check with your doctor to rule out anything, okay, sebab pregnant bodies memang need more support at this stage. Macam mana your energy level during the day, and pap dah test your iron recently?