Yellow discharge in pregnancy

For the past few weeks ive been getting alot of discharge, which i know is normal but the colour of it worries me. Most times Its yellow. Sometimes brighter yellow than other times. I had my 24 week midwife appointment yesterday and told her about the discharge but she said as long as there isn't a smell or it doesn't cause itching she isn't worried. But I'm still worried. I thought she would have done some swabs just incase? Should I go and get swabbed for any kind of infection somewhere else or just listen to my midwife and not worry?