Implant v. Pill.

I got the implant after having my daughter. As much as I LOVE it I am to my limits with the whole bleeding for 2 weeks during AF visits. 
What's a good type of birth control pill? I know every body is affected differently from BC, but what is one you have lost weight with? 
I don't want to gain more weight than I have. I gained 40+ lbs when pregnant and have lost 20-25 of it.