If you don't want to get pregnant straight away then use condoms and make an appointment with your doctor to discuss what type of birth control will suit you. There are lots of options like pill, implant, coil etc.
Another option I love is nuva ring. You don't have to remember daily! The pill losses its effectiveness if you don't tske it at the same time everyday. Plus I find nuva ring doesn't mess with my mood. I am far less moody on the ring.