Leaking Tampons

Emma

So I got my period and I had put in a tampon a few times before, I was still on one of my heaviest days and using Tampax regular I had it in for maybe 3 hours max before I changed it. I went swimming in it for 40 minuets with the tampon in. As soon as a got our of the pool blood was running down my legs... I changed it as soon as possible maybe 5 minuets later is was sooo EMBARRASSING.... has this ever happened to you?