Is it normal for your period to last longer than normal?

I recently became sexually active, I'm not on any birth control pills, or I'm not on any medication. This is going on day ten, what the heck is going on? It is a lot less blood than before but still enough to where I have to wear a pad tampon, and it still looks as if ima be on it for at least 2 or 3 more days. I don't want to go to the hospital unless I know for sure this isn't normal. Is it? Should I be worried?
Is it normal for your period to last longer than normal?
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