It feels like an ant bites my inside vagina, it last a few seconds , 2nd time in 24 hours, what might this be, have noticed in the last 24 hours, a slight greenish discharge on panty and odour smells stronger than normal , I haven t had sex in 3 days but the last 9 months I have had about 5 UTIs, I am 54 yrs old and am sexually active, I hope this information helps as to what could be the cause of this , thank you