This is a pr-estage of any mental disorder. Or may be it is a base for that.Over anxiety about female genitals are not normal.It may be due to some basic causes like childhood sexual abuse,worse experience, physician assault, harassment, relationship problems, experience of sexual act etc.There are many Causes, to deal with such conditions u must reveal ur past history. How this havit occur,why occur etc.Consult psychologist immediately online or offline and take help and built a better mental healthy life. Best wishes....