Removed IUD still no period???

Hope
I got my IUD removed over a month ago. I had the typical bleeding a couple days after that lasted a week and now I haven't had a period in a month and a half. Every test I've taken says not pregnant and I'm pretty sure I'm not but I was always regular before. My hubby and I are trying to conceive but its hard to do when my body isn't behaving... should I be worried is this normal after and IUD?