Hi, I had mine out on 23rd Oct 2020, having had one for 13 years. I had a withdrawal bleed 2 days later, then my first proper period 28 days after. Hormones were all over the place before my first AF... My poor partner 😂
The Nov/Dec cycle I’m pretty sure I didn’t actually ovulate, hormones had settled down though.
Then Dec/Jan I had really strong ovulation pains on 1st Jan, DTD accordingly, then had mega symptoms from 6DPO - nausea, dizziness, headaches, bleeding gums, constipation, elevated HR. Got a strong positive yesterday at 10DPO 😃
I think it depends entirely on the individual though - I had really regular light periods all the way through having the mireana, and have had regular scans since I had one in, because I had such an awful time with AF when I was younger, and I have a family history of cervical and ovarian cancer.