TTC after miscarriage


I found out today that I had a miscarriage this weekend, although I saw the baby and the heartbeat on Tuesday and everything was fine. I was 8 weeks. I’m still lightly bleeding/spotting and have light cramps and they said it might be going on even for 3 weeks. They also said I should get my period 4-6 weeks after miscarriage. But what if I get it earlier and will not know if it’s still the bleeding or actual period? How fast after miscarriage did you have your period? And when did you ovulate? I’m devastated from the loss and would like to start ttc as soon as possible :(