What is a good birth control? ?

What is a good birth control that helps you lose wright or doesn't make it hard to Lise weight I'm on mirana now an I hate it I gotta get it taken out I had my daughter 6 months ago an I was loosen alot of wight then when she was about 3 months u got mirana an started gaining weight I started exercisen alot still gained I stop drinking soda gained 5 lbs ! What's going on any good birth controls I can take once I get off mirana or any wight loss tips ??? Thanks guys