IUD missing period

So I had my iud inserted back in March 2019 and after that I had my last period on June 2019 and ever since then I haven’t had a period till recently yesterday that I noticed it had gone through, my first thought was that maybe my iud moved but I feel no type of pain whatsoever, so obviously I got kind of worried cause I had read that your period only come back if iud is removed.... if anyone has experienced something similar please let me know lol