Thank you for replying lathus and ihateamerica. 

@lanthus:  I read in USCIS website that registered nursing does not fall into H1b category. I am not sure how credible is your source. 

@ihateamerica: at this point I also hate america... :(

Well, I donno what else are my options.. I hope I will be able to find job at least during OPT.