You said you don't know anything about computers but have a degree in IT ??...My friend what I would suggest is take some IT courses from community college if you don't have any knowledge in computers or find the field that really interests you..If you haven't done soul searching this is the best time to do so...What is your overall G.P.A.  and what did you major in??...

It is not end of the world...You said you want to join Grad school, get a killer score in GRE/GMAT, write a Personal Statement stating the reason for not doing so great in the undergrad...Admission Commitees are also human and they do understand the pressure undergrad student goes through specially "International students:...so, buckle up, put a smile on your face and 'FOCUS'...let me know if you need any help..

Axl