Long period??

So I've been bleeding for 10 days now and I'm getting kind of freaked out.

It's been fairly heavy all 10 days, which clots, but not huge ones.

I've been going through a regular tampon probably every 3-4 hours.

I did get my IUD taken out in early October, and started having very light periods in December, but this is the first month where it's been heavy and lasted this long.

Could this just be my body catching up, or should I go see my doctor?

I haven't felt anemic or anything either...