Which method is best for me?

I want birth control but I haven't even had sex yet.

Some concerns I have for the pill, shot, and IUD are that the hormones will cause me to gain weight in unappealing areas.

My concern for the pill is that I will forget to take them regularly and that they will make my periods heavy and cause cramps (I don't get cramps).

My convern with the IUD is that it will be misplaced and that if I get it, it will mess my uterus up and it will mess up my ability to have children

I don't trust condoms for anything but STIs. I don't want a surprise either. I'm only 18

…help