Iud pregnancy?

lulegirl2018
Okay so question. Me and my SO didn't use a condom for the first time since I've had the skyla well we had sex like 2-3 days before my period was supposed to start. The first day I had a slight spotting like normal and now it's like light pink could I be pregnant or do you guys think my body is just finally getting used to the skyla and I'm starting to not get a period??