Hi,thanks for posting your query at HCM
Ya you are right as per my information there are chances that female can be born without a
hymen As you said that you had asexual intercourse at the age of 14 years and that you had a missed periods followed by light bleeding. Without any mention of any tests from your history I can only guess that it could have been
abortion.
Regarding the
masturbation thing I am sorry that there was nobody to guide you .But you must take some elderly person esp. your mother into confidence to guide you better .
And now you again complaining of amennorhea 9missed periods ) for 4 months the reason could be anything from
hormonal imbalance to any underlying pathology in the
uterus or vagina . We can only start with the treatment once it has been ruled out
Yes there are chances you could be given birth control pill that could help in starting your cycle and making them regular
If you want that your OB does not tell anybody , you have full right to maintain the secrecy of your life
And again it is your wish to tell your mother
Hope you are able to cope with the situation
Take care