Miscarriage

I have a miscarriage on 16/8/2020.

I was told by the nurses to start ovulation testing once bleeding had stopped and I did, 5 days after my miscarriage I ovulated. Can this be right?

My apps says I should ovulate on the 28th August but I don’t know what to expect as my cycle has been a bit all over the place. As I was pregnant and now I’m not