Tampon Leaking

Clea
Does anyone ever have trouble with their tampons leaking? I usually have a light flow, but my tampons still leak. I have used every size from XS to Super Max! 
I feel dumb asking cause I'm 23 and I apparently still can't use a tampon the right way even though I used to be a swimmer 😂 before you ask, I think the water would make the tampon increase in size and so I would avoid leaking while I was swimming. But if I'm not swimming, my tampons always leak!