I've been on birth control since my early 20's and now I'm 39. My...

I've been on birth control since my early 20's and now I'm 39. My most current bc was Diane 35 which was not bad. I was scared about the risks of using birth control after the age of 35 so changed to a lower form of birth control-Aviane. Was suppose to have Alesse but was given the generic Aviane. I've gained weight so most likely due to my bad habits, old age due to a lower metabolism. I'm sure I'm at my max weight of 120. I've been feeling horrible in the dressing rooms when I'm trying on clothes and my stomach seems to be more "muffin top" than normal. Also, feel very bloated all the time...thus, a spa rep had asked me how many months I was(might have been the type of top I was wearing but...) I just went on the scale at a gymn I was trying out and to my shock I had gained 10 pounds? I haven't eaten that much different lately...is it Aviane? I think it's time for me to get off bc..