No period but negative blood test

Hi
I'm 20 years old I've neverbeen late and never Been early my period was to cane one June 8th and it's now June 21st. I feel different like I'm sick I feel like throwing up, light headed, I had light pain in my lower stomach, and a lot of back pain. I had a doctors appointment on June 10th and the blood test was negative but my period still hasn't come. Is it possible I could still be pregnant? Should I go to an obgyn or go back to my regular doctor? Please help

[Elaine Brown, MD]

Hi!
If you were my patient, I would probaby prescribe some progesterone at this point to "jump start" your cycle.  I like to use Prometrium in these circustances so just in case there is an early pregnancy, we are not using anything harmful.  If you are pregnant and take Prometruim, nothing happens.. If you are NOT pregnant, it should start your period for within a couple of days

Either your regular doc or an ob/gyn could do this for you!

Good luck!
Dr B