Missed period?

Hello, I got my copper iud placed November 12, 2019 and my period came mid month (15th) then in December and January it came the 4th to the 6th but now I haven’t had my period. I know I should not be stressing out because I still have a whole month left. My regular period before and after giving birth to my daughter was the 26-30th. So this is new to me if my period is flip flopping

😅 is there anyone who’s gotten pregnant while having the copper iud inserted?