weight gain

I had my Roux-en-y gastric bypass in 2000. I lost 160lbs and i have put back on 56lbs in the past 3 years. I have asked my drs office and they have just told me to eat more protein. I need more help then this. What should I be eating on a daily basis? Should I cut out carbs? Should I count calories? Please help I do not know what to do and I am scared of gaining any more weight.