Liletta

So I went on the 17th of this month and got liletta IUD put in. This is my first time having an IUD. I have yet to stop bleeding! Not as heavy as a normal period but not as light as normal spotting. So my question is how long did you bleed after getting your IUD, and how long if it continues should I let it go before worrying? I've never gone this long bleeding, my periods are normally only 3-5 days max.