Stuck!

Hey guys I'm 17 and have recently started having sex with my boyfriend. So obviously I want to stay protected but I'm just not 100% confident with condoms. So I was just wondering what the injection was like. I've been on the pill before and my body didn't like it, I was sick all the time and I've been to my doctor and she said to get the injection (depot). I've done research on google of the side effects but I would like to hear some experiences that some of you lady's have had that way I can make a decision😁💕 xo