Thanks for the query.
Yes, sometimes intrauterine device
can lead to irregular periods
Possibly you may need higher dose of hormones to control the bleeding.
So consult gynecologist once, and get examined.
If your cervical region is completely cured, IUCD should be the cause for your problem.
By taking anti-fibrinolytic drugs and hormones bleeding can get controlled.
If not you may need to get the IUCD removed.