Klinefelters syndrome? 23 yr old?

After doing some research I've have come to believe that I have klinefelter's syndrome.  I originally saw a doctor because I thought I had Marfans syndrome, but upon further investigation, my self diagnosis has changed.  I exhibit many characteristics of Klienfelter's Syndrome i.e. tall, extremely long arms and legs, big hands, big hips, Gynecomastia, mild sexual dysfunction, no chest hair/limited facial hair, high voice.  
However I have a very tall and lanky family and my dad didn't really develop chest/facial hair till later in his 20's. I also have quite larger testicles and penis, definitely not underdeveloped. I went to a GP and and endocronologist about 1 1/2 year ago and they took my blood and everything, but gave me no definitive answers. Is it possible for me to have had an extra X chromosone, but not show up on the blood tests?  Would the endochronologist be able to make a Klinefelter's diagnosis?

Does it sound like I have Klinefelters? Any advice (other then go to a doctor) I know I should go to a doctor, and I will.  Thanks!

[margypops]

This forum is mostly for children but I am sure you will find help if you go back to the forum's page and look to your right we have many expert/dcotors will be able to help and give advice ..Good Luck

[eureka254]

Not knowing what your GP and endocrinologist tested for in your blood makes it impossible to determine whether or not Klinefelter syndrome was ruled in or ruled out.  
Diagnosis of Klinefelter syndrome can be made using a blood test called "peripheral blood karyotype" or "chromosome analysis."  Hope that helps.