Hello,
I have gone through your query and understand your concern.
It is very rare to become pregnant with
Intrauterine device.
If some one conceive, then it may usually end in
missed abortion.
One rare and life threatening is ectopic
pregnancy.
Coming to your query, It is usual to have the
irregular periods upto 6 months after IUD insertion. In some, these irregular period may extend upto one year and eventually comes to normal.
If you had the periods ( Even if late), nothing to be concerned about this.
As i said it is usual and need not to worry about pregnancy.
You should consult your treating doctor, if you have any
abdominal pain or missed periods, fever etc.
This may need necessary attention and proper treatment.
Hope this helps.
Please write back for further queries.
Wishing you good health.