 [ Symptoms ] i was getting my cycle every two weeks and today is cycle 21 and no period negative pregnancy test can i be pregnant  i was on depo and my last shot was 09292015 i am currently ttc and in feb i started to take vitex and noticed my cycle was coming every two weeks so i discontinued use in march i start dong quai to help regulate my periods and still the periods was every fourteen days so when my last period started 041316 i stopped the dong quai now it has been 21days since my last period i took two pregnancy test yesterday and they both were negative did my period regulate or am i pregnant [ Disease ] the only advice that i can give you is to have your son see a medical professional someone who can take a detailed medical history perform an examination and order some essential diagnostic tests there is really nothing that can be done blindly over the internet to get to the bottom of this complex issue as a concerned parent see that it happens