even though you used an unscented soap it still may have had an effect on your body's ph. try not to use soap on your personal private parts those parts are self cleaning. washing with water is sufficient. or if you just have to use soap try a feminine wash (summers eve) that is designed to not ruin your body's ph. if you insist on using regular soap make sure that you rinse your parts extra-super-thoroughly. even a small amont of soap residue can be irritating to the female parts and cause that itching and discharge.
after using scented soap. i now have clear odorless discharge and a slight itchin my vaginal region am i allergic? . it doesnt burn to pee just seems irritated.