Ay sis, totally normal yan! 17 weeks pa lang kaya expected na may increase ng discharge, white, milky, or even a bit watery is all part of protecting baby. A few of my mum friends had the same thing at that stage, at lahat ng doctors nila sinabi it's just your body doing its job during pregnancy.
The key thing lang is: as long as walang weird smell, hindi ka itchy, at walang blood, you're good! If it's lumpy or off ang kulay nito, that's when you might want to check with your OB in case may infection. But honestly, first pregnancy can be super paranoid kaya better to just call your doctor if you're worried, they can do a quick check and put your mind at ease din!