how long did it take for you to get pregnant after IUD?

Cheyk
I got off the IUD (mirena) in feb. I had it for 13-14 months. I just had my first period after it and it was normal. I think I'm fertile( this is our first time ttc, our other kids were not planned) So I'm not 100% sure. It just very went and slippery CM
How long did it take you after you were off to get pregnant?