I was told that the further along you are, the later it can take your cycle to go back to normal.
But after losing ours at 12 weeks, I am back to normal already, not even 4 weeks later.

But definitely make sure you are emotionally ready. I know I wanted to just think of trying again straight away initially. But now that I'm not allowed to, it's given me time to relax a bit and go through it all, and I think it's helping me cope. And it's certainly like having a second chance to be ready for pregnancy.