Mirena IUD after removal problems

Lily • Breast cancer survivor, saving before TTC.
Removed the iud, 3 months later normal cycles, a few days early but nothing super abnormal. Since I had the iud removed, I've been having constant nausea, pain during sex. This past month a week after I had bleeding, like a light pink/brown not normal spotting. But just a small amount. Then this month I started getting headaches out of nowhere, worse at night, ever day, am so tired, and have been having really vivid off dreams. Anyone have any ideas, would be appreciated.