Iud & sex

I got an iud mirena in places May 2nd and I was told from my doctor I would be good for “unprotected “ sex in few weeks but I was still scared about doing it. Well one day my SO an I were drinking and turned each other and had sex “unprotectedly “ and he cum inside me and I jumped up an ran into the bathroom to then feel warm wetness coming down my legs (his cum) we went for another round and he did it again and same thing happened. I love my iud! Lol and yes my SO did feel my strings poking him a little