Birth control

Erin
Hey. I'm rather sexually active and I'm looking for a reliable form of birth control (mainly for if the Condom breaks or fails)
Sure I have to visit my doctor an see what they say but the one they put me on last time made me gain 30-40 kg. almost finished loosing that weigh again but not willing to try it again.... Any suggestions for good pills or the bar or injections. Idk. Helpppppp!