At this point, it seems that the most important action to take is to cure the Chlamydia infection. According to your text, you have completed this successfully. The present discharge could be due to another infection or to the pregnancy itself. Another infection can be confirmed or excluded by a vaginal examination and microbiological smear. A Pap-test can be also done. Any vaginal infection (colpitis) during pregnancy should be taken very seriously because of the possible implications (miscarriage or premature birth) for the pregnancy. You can contact your gynecologist for an examination and further expert advice.