Weird cramping IUD

kt

Hi! I am 15 weeks pp and got an IUD at 6 weeks pp. I had spotting after that for a few weeks. During week 14-15 I have had a constant ache in my left ovary. It feels the same as when I had a cyst, but worse. I feel like it’s even tender to the touch and I experienced a small amount of spotting. Is this my period? Before I was pregnant/IUD, I had pretty bad mensural cramps. This is more of a constant pain and doesn’t come and go.