Well I have 3 herniated discs in L2 L3and L4, so trust me when I say that the biggest thing that contributes to this injury is not resting when you feel hurt.
However, in my situation, I actually went to see the doc multiple times, but being the ignorant person she was, she waved it off as complaints since I was quite young when it first happened.
And so I kept lifting and playing my sport at that time(football) and when I finally got an MRI months later, what do ya know, it's 3 slipped disc and permanent damage.
So basically what I'm trying to insinuate her bud, is fuck doctors and whoever else tells you that nothing is wrong with your body, cuz chances are that you aren't being a bitch and really have some thing wrong with you. Be vigilant and listen to your body, because it will not lead you astray. And if you don't understand what's going on in your body, make sure to read, read and then after that read some more.