Adoi, 33 weeks tu memang banyak physical changes happening, berat perut pulling on your posture, hormones jugak affecting blood vessels, plus lack of sleep kan semua contribute to headaches. A few of us mums-to-be kena headaches gak masa akhir trimester sebab tension sa neck and shoulders from carrying all that extra weight depan. Since your BP, Hb and sugar semua okay, it's likely pregnancy-related tension headache, tapi I'd really suggest check with your doctor just to be safe la, especially kalau macam worse atau ada symptoms lain, they might suggest simple stuff like massage, hydration, or rest position yang better. Jangan worry too much, but do mention it at your next check-up ya!