TTC after Mirena issues?

I just had Mirena removed on 11/27 with no period for the 3 years it was in. I still haven't gotten AF, and typically it comes around the 18-20th of the month, at least in the past. Has anyone else had this issue? And if you did, how did you overcome it? We are still "practicing" as much and often as we can, yet no luck.

Any advice?