It has been almost 2 weeks after taking azithromycin for chylamidia, still having very slight itching, but no discharge. could it be yeast infection?

Vaginal itching: Yes - if the itch is not too bad, the gynecologist who gave you the azithromycin could evaluate your for vaginal yeast infection when you go back 3 weeks after azithromycin treatment for test of cure; else, call the office, and see how they suggest to proceed.

Itching: Yes after taking antibiotics, yeast infections are very common. Try an OTC treatment, if it does not work, back to you ob/gyn for you.

It could be but...: It could be but I suggest you get rechecked to make sure the infection was fully treated. Bacteria develop a resistance to certain antibiotics. Your doctor can determine whether you need further treatment.