Period after miscarriage


I have never posted on here before so forgive me lol I just have a question for you ladies. I found out I was pregnant last year on may 23rd ended up miscarrying, this year I found out I was pregnant on may 25th (ironic I know) and miscarried a week later. both times my body miscarried naturally , I bled the first week of June this year. according to this app my period is 12 days late 😒 tested last week and again today , BFN . have any of you experienced this? my doctor said it can take 3 months for AF to return to normal, last year she was on time every month after my miscarriage 🙄