Delayed Period & Negative Pregnancy Tests: What Could It Be?

Question
Hello,im 21 year old and ive missed my period for about two motnhs already,my last menstrual was (dec 29  and ended jan 4th),we are now mar 9th! ive had minor cramping i feel extremely tired  and have a sharp pain on my left side that comes and goes. i went to see my ob gyn and he did a urine preg test but it was neg. then two weeks later he orded a blood test to check my hcg level and well that came up negatuve too! he has me on provera right now 10mg for ten days im on my last day and nothing! i feel cramping and tiredness that i cant stand it! what else could be wrong with me? should i go back and get another preg test.im maried by the way and me and my husbamd have unprotected sex BUT he doesnt ejaculate in me at all,so i dont know any other reasonable explanation please, do you have any advice for me??  this has never happened and i dont take birth control or anythild i do any ideas?? (everything in my blood work ws negative or normal) please help! im miserable and im extremely moody !! Thanks . Liza

Answer
Liza,

I am sorry for the troubles that you are going through.  Menstrual cycles can be so crazy and get out of whack pretty easy.  Even stress can keep you from ovulating and therefore delay your cycles.  However, it is good that you doc is checking things out.  Sometimes ceasing menstruation can be caused by thyroid problems and other medical conditions.  If your blood pregnancy tests have been negative, there is a virtual 0% chance of you being pregnant (or at least being pregnant enough to have HCG in your blood which happens at implantation - 7-10 days after ovulation.)

I'm sorry that I can't give you any better insight!  Good Luck and I hope your doc finds answers soon!

Tandi