HI DOC IM 23 YRS OLD LADIE I HAVE A PROBLEM OF MISSING MY PERIOD FOR FIVE TO SIX MONTHS AND I HAVE NEVER USED ANY CONSACEPTRIVE AND I HAVE UNPROTECTED SEX FOR ALMOST FIVE YRS BUT STILL I CANT FALL PREGNANT AND I REALY WANT TO BE PREGNANT WHAT CAN I DO PLEAS HELP