Mirena period

Hey ladies! I got my mirena inserted 6 weeks after I gave birth to my son. I never really had a period after that. I got it removed over a month ago, had 3 days of bleeding that week (my average period length) and since then have had nothing. If I was going by those days my period is very late but I also know that it's been a while so my body may need to just adjust. How long after your mirena was removed did you get a usual period? We would love to start trying for our next baby but don't know what's going on. I've taken 2 pregnancy tests- both negative- which is fine.. I just don't know what's going on lol any insight is welcome!