Sayang, lendir putih tu memang boleh normal dalam pregnancy, tapi since doctor dah scan dan tak nampak apa-apa, I think kena follow up dengan doctor lagi to be safe, especially considering your last miscarriage. Better get checked properly, either call clinic or go in person lah, jangan tunggu. One of my mum friends pun was worried about discharge and the doctor put her mind at ease once dia check properly. You okay? Lean on support if you need it.