I went to the doctor and was told i have thrush, 7 days after using the one dose fluconazole 150mg, im having clumpy beige discharge, no itching. does it mean that the thrush is back?

It sounds like you are referring to a vaginal infection. Your symptoms could mean that the infection was partially treated. There are over the counter anti fungal vaginal suppositories you can use to directly treat these symptoms. You could ask your pharmacist to show you these preparations and you would follow the instructions on the package. If the symptoms then continue, see your doctor again