I'm sorry for the loss of your baby.
While for many people there is no medical reason to wait for your AF before trying again, I personally think it is worth thinking about delaying until after your first AF,
At the very least, I would suggest making sure that you don't start trying again until you are absolutely sure that you have physically healed. I've had 4 mc and developed infections after two of them (one followed an ERPC). These had to be treated with strong antibiotics and this would have been even more stressful if there had been a possibility that I was pregnant as some antibiotics can be damaging to developing fetuses.
I would also strongly recommend that you do not start trying again until you have got a negative on a pregnancy test. This ensure that you don't have to deal with the horrible situation described by dcb when you think you are pregnant, but in fact the test is just reacting to HCG left over from the pregnancy that has just ended. The length of time this takes depends on how far along you were when your pregnancy ended. If you lost your baby at 6 / 7 weeks, it might only take a few days. HOwever, if your pregnancy stopped at 12 weeks it could take 30 - 35 days (or maybe more) to get back to zero.
Incidentally, it may be helpful to know that ovulation predictor kits are not reliable if you still have HCG in your system. They will come up as positive.
Good luck with your next pregnancy. If this is your first miscarriage, the chances of things being OK with your next pregnancy are still excellent.