Suggest Treatment For Itching After The Removal Of Old Tampon From Vagina

Hi im 18 years old , about 225 pounds , 5'11 in hieght , im recently on birth control and antibiotics.
My doctor told me that the last tampoon i used was to dry when i pulled it out so it left some behind causeing an odor , she cleaned it so the ordors gone and she prescribed me some antibiotics , since that visit the itching had gotten extremly worse , i feel like i can not leave my house because it gets so bad and i take a shower to calm it down