Tampons

Jay

So I'm 16 and I have a serious problem using tampons. Like I know how to put them in and everything. But in the next 2-3 hours or so, I go to change the tampon and have found that I bled through and the tampon has absorbed little to no blood at all. I don't know if it's because I'm using the wrong size or if I'm just not putting it in correctly. Can anyone help me with what to do?