Can't believe this happend to me!! what do u think was the cause, is there something wrong with me?

Sounds like you may be have just been over tired and over stressed. But you might want to talk to a therapist. I am sorry that you didn't graduate with all honors. But, give yourself credit for working so hard.You can't be perfect. You can't even try 100%, 100% of the time. You are only human. Doing your best and trying your hardest, has GOT to be good enough for you. You need to be your own best friend. Being this hard on yourself, will back fire and weaken you. Give yourself credit, to build yourself up and to help you be strong. Your reaction is not too unusual. You were probably not breathing properly, because you were so stressed. You need to breathe slowly and deeply, to feed your brain enough oxygen. Be strong. Forgive yourself and plan your future well. But remember that sometimes things won't turn out the way that you planned. And that is normal and ok. If you are worried that some one will mention that you walked the wrong way or something, just make a joke of it. Like, " I was so upset that I didn't graduate with honors, that I went looking for the rest of my brain!", or something.You can only do your best, and you are only human. Congratulations on your graduation. You are a hard worker and you are needed in this world. May God bless you in your future endeavors.