Worried

I’m 19 and I had my daughter five months ago. Six weeks after she was born I had the mirena iud placed. I’ve heard so many good and bad things about this birth control. But sometimes I sit and think if it will mess with my fertility later on. Has anyone else had these worries? Or am I just overthinking? Idk i am new to this birth control and don’t know much about it. I’ve read the articles online but they didn’t help much.