Sex 2 weeks on Mirena

Hi everyone, I got a mirena iud inserted 2 weeks ago and I let my boyfriend cum inside me last night. I think I’ve been on my period this week but I’m not sure. Mostly cramps and spotting. Also after we had sex last night it felt like I was having period pains and there was some blood. Am I okay? Was I protected. Ease my mind! I’ve never had an IUD before. Thanks everyone!