My wife of 22yrs started experiencing itching in the vagina area. She thought it was a yeast infection. Her doctor told her it was a std. Ive never slept around and this whole ordeal is leading me to probably divorce her unless i find out this medication is prescribed for things other than std. She was given 4 pills to take and 4 pills for me to take. Does taking metronidazole mean that a person has a std? I appreciate any information available. Thank you