surgery and stopped losing

I was wondering what everyone thinks about this.... I had my bypass on Nov.29,,,,, almost 1 year ago. I lost about 10 lbs a month from November to May (which totaled about 60 lbs then),,,,,,, then i had my gall bladder out in May,,,,,,,,, since May i have only lost about 20 lbs.............. Now that is so depressing and I am wondering if the gall bladder surgery could have anything to do with the almost nonexistent weight loss............. I have an appt. with my doctor on Tuesday,,,,,,,,,,, but i was wondering from some of you who have more knowledge than i do on this subject if you think something could have happend during the gall bladder surgery to cause a problem with my by-passs....... thanks for listening. joann