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has to be differentiated to find out as for what sort of infection is causing it like:-
curdy white in candidiasis
yellowish in bacterial infections;trichomoniasis
clear discharge which may be normal also if there is no itching .
You can take Syscan in fungal or candid infection it may help but in other cases it won't help.Better option will be to get examined by a Gynaecologist and treated accordingly.Self medication
is not good .