I had d&c back in march 2014. now september, still having light periods and still no luck of conceiving. what are my chances of having ashermans?

See details: A D&C can be associated with Asherman syndrome. If this is a significant change from your periods prior to the procedure, I would suggest you follow up with your gynecologist. This can be determined by an office hysteroscopy or a hysterosalpingogram. The hysteroscopy is preferable. If there's a high index of suspicion, an operative hysteroscopy can be done at the hospital to treat the Asherman.