Period after miscarriage?

Doc said period should likely return 4-6 weeks after bleeding from my miscarriage stopped. I miscarried 8/4 and it was about a week of bleeding. I took OPKs and it was positive 8/22. Period should be expected about 9/5? Have taken tests the last week and all negative. Did have some cramping like I was going to start my period but still nothing and now no symptoms like it’s still coming.

Anyone else have their period return the 4-6 weeks or did it take longer? My period was very regular before hand. I hate not knowing when it’s coming and not being prepared when it does ☹️