Wow! I can't believe a father wouldn't believe his 11 year old daughter! Taking a test 7 times and all being positive? And the fact that you have started your period? Im sorry to say but you may very well be pregnant. But do not worry, there are people who you can talk to. E.g. A Councilor. Does your school have a Councilor or somebody you can talk to about problems? Because they can be your best option. Also if you have been raped, I highly suggest talking to the police about this, especially if your pregnant at your age maybe calling them will be your best choice. Because they can keep Jason away from you.
I hope everything goes right for you.
Feel free to
PM me!
Chris