I'm worried about skin cancer. Can anyone tell me if they think I am at major risk?

I have been recently worrying about skin cancer, sunspots, etc. I'm very fair-skinned. I haven't been out in the sun much recently, but I was outside more when I was younger (I'm 15 now.) Although I usually put on sunscreen, I did get a pretty bad sunburn when I was in middle school. All of my other sun burns have been fairly mild. I'm just concerned that some of those sunburns will catch up to me. I haven't been outside much the past few years, which is why I'm very pale at the moment. I've always been fair-skinned and have burned easily. I'm going to try to stay out of the sun as much as possible, although I do have a bit of a sunburn at the moment. I've NEVER tanned in a tanning salon or just layed out to try to tan. Can anybody help me and possibly give me more information so I can see how much at risk I am? Thanks!