Should I get x-rays for my spine?

It hurts every so often,like it'll be ok for a week(but hurts to do a lot of walking) then it'll start acting up again so I'm layed up in bed...then I noticed when I was getting changed out of my pj's this morning my right shoulder was a lot lower then the left..and my sister keeps saying I might have scolios(sp?) like she does...same with my friend,and i have been to my family doctor but they aren't the most honest doctors ever...they told me my spine was straight but i had my sister who has this issue to feel my back and she said it felt a little curved to her...should I switch doctors and get a x-ray? I'm 14 by the way..