First Period on IUD

A

So, I’m right now experiencing my first period on my IUD and it’s very light, which I’m not so alarmed with because I’d expect it to be light. However, I didn’t expect it to start and stop. Every four hours I’d go and use the restroom and it’s like by random chance when I wipe, there would be blood or no blood. Even when I wipe, it is still pinkish. I am not sure what to make of it. Is it because it’s so light that it is starting and stopping?