Mestilah normal lah, especially dalam pregnancy ni semua things hormonal jadi lain, a few of my preggy mum friends ada keluhan yang sama waktu second trimester, dan doc kat clinic cakap it's just increased discharge sebab hormone changes, nothing to worry about. Tapi kalau yellowish discharge tu ada bau tak sedap ke atau dengan itching and pain, better check with your doc just to be safe, sebab sometimes kena monitor je untuk peace of mind. Drink plenty of water and wear cotton underwear, that's what I usually do!