Tampon discomfort?

Kate

So this is my first period heavy enough for tampons and I had swim class today so I decided to try them. Anyway they feel fine (barely even noticeable) for the first two / three hours. But then I start to feel so uncomfortable and like I assumed that means I filled it all the way or whatever but when I go to take them out they are all dry on the bottom! Is this normal ?? Sorry I’m just worried