Ok I had a miscarriage Aug. 5th. I was almost 6wks. The bleeding lasted 8 days.

Well I got this app because my period just started on 9/11 and I wanted to keep track of it since I hadn't gotten an actual period since June. But the app showed I had a period July & August but I didn't so I fixed it. But now it's showing my cycle length is 78 days so I don't know when I'll actually ovulate. I changed it to 30 days but it still shows "next period in 70 days" when I scroll through the little calendar bubbles. How do I change that?? I want to know when I'm most fertile but it's showing months from now. & showing my next period is in November instead of showing one in October like it's skipped.