Has anyone measured behind and had good news late


I went to my appointment at an ultrasound boutique today. Thinking I was 6 weeks 2 days. I measured 5 weeks 5 days. Tech said I could have ovulated late. My period have just now become regular from being off the shot. I got my cycle again in May after being off the shot since December. She did see a heartbeat 80 BPM she said baby was high and cervix was closed which is not what you see when you’re about to miscarry I guess. So now it’s just a waiting game. Has this happened to anyone (measuring behind) and something positive came of it later on?? My actual doctors appointment isn’t until 10/24