severe nausea after RNY

I was wondering if there is anyone else that has had a RNY that is nauseated at least 50% of the time.   I had the surg 8/09.  I still take phenergan about 4 times a week.  I have anemia and other low electrolytes (K, Mg, Ca) could this be causing the problems?
Thanks for the help.
Amy

Have you been checked for a stricture?