I'm 17 yrs of age... my periods had begun when I vs 12.I have always had regular periods bt this is the 1st time when I have missed them.. my scheduled date vs 20 bt nw they haven't come even aftr 10 days.I have stomach cramps as if my periods vill strt.. I have never had sex.. I have itching in my vaginal lips;.. secretion of a white watery fluid... I am tensed about my problem... please help me out fasttt.. plzz