Spotting but no period

Hey guys, I’ve been on the copper IUD for a little over a year now. Normally, I have a quite normal period around the same time every month, this month it was late and pretty much 4 days of light spotting then done. I had symptoms like breaking out and bloating but no cramps or soreness. I’ve been working out about 5 days a week and dieting, is this why my period was so weird? That’s what I’ve been told but I still can’t help but worry about that slim chance of pregnancy lol