Its been 51 days since my last period. i had a blood test 2 c if i wa preg & it was neg. could it be wrong??

im 19 and so scared. i just need an answer.

Its been 51 days since my last period. i had a blood test 2 c if i wa preg %26amp; it was neg. could it be wrong??
You can get your period regulated with birth control pills, I hear. You should explain your situation to your Doctor.
Reply:wow !! do you have regular cycles ? I would think if your blood tests are neg. that they should be checking out other reasons why you havent had a period. Something like your thyroid or if you have Poly cystic ovaries or what !
Reply:have you talked over the options with your doctor on what your body maybe doing. for a pregnancy test to show positive you need enough, i forget what it is, but you need enough of it in your system to show a positive pregnancy result.....then again it could be something else like stress or how active you or like said elsewhere your thyroid or something with your ovaries. a doctor should beable to help you learn about what's going on with your body