Slight vaginal discharge is nothing to worry and that is not affecting your fertility,but both need to be dealt with.FIRST for fertility I would suggest you to do basic hormone tests
TSH,
PROLACTIN,
AMH and CBC.You may have relation in your fertile days which can be monitored very precisely with follicular studies (sonography),Also ask husband to do a semen analysis.Most important is relax and do not take stress.For vaginal discharge rule out infection once with Gynaec.