You can start trying any time but when I had mine I waited about a month or so. Good luck I hope this helped.
I had a miscarriage at the first of feb & was 6-7 weeks pregnant & my doctor told me 2 wait until after ur first period. That way they have something 2 go by for a due date & 2 make sure all the hcg is out of ur body from the miscarriage. I haven't heard of a doctor telling u 2 wait 2 have sex unless maybe u where further along or had a d&c done.
When i got the ultrasound for my miscarriage the doctor told me not to have sex for at least 6 weeks so im completely recovered..