Girls, How to stop drips down bum while wearing a tampon?

Ultra-embarrassed to ask this, so I'm anon. Cutting straight to the chase - I only got my period about 7 months ago and I'm still quite new to wearing tampons. Due to the shape and size, I'm having an issue that when I go to the bathroom, I get drips, sometimes a stream to my bum-hole. I've tried addressing this by sitting in a different position to no avail. My main concern is if this is dirty or dangerous? I try to keep very clean and I worry about getting pee all over myself.

Girls, How to stop drips down bum while wearing a tampon?
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