Birth control and implant.

So I just had my baby a month ago, and im planning on getting the implant on my arm for BC but im not sure what to get now I've heard people get migranes with those and gain weight. I also want to be on the safe side. The last thing i want is to get pregnant again, had a bad birth experience via c section and im traumatized, so if any of you out there have any birth control recommendations let me know please.