Oo normal lang yan, mama! At 28 weeks kasing-karamihan ng preggy mums namin may ganitong white discharge talaga, it's just your body preparing for labor, kaya don't worry too much about it. Pero if it starts smelling really bad, or may itching, redness, or pain, definitely check with your OB na para ma-rule out any infection kasi dapat ma-address agad yan sa pregnancy. Kung gusto mo peace of mind lang, ask your doctor rin sa next check-up mo, walang problema dyan!