Please do not travel out of States when you are in OPT unless you have a strong logical reason to re-enter. During you visa interview, You must have said the counseller in american embassy in Ktm that you would return home after you graduate. So, there is no point to extend your student visa. 

You may carry another I-20 for another course and can try your luck...but believe me its going to be tough. If your company sponsors you H-1 visa, things turn around.

Good Luck!