ovulation after miscarriage help needed

Simona
I have had a natural miscarriage (no d&c) on the 3rd of December I was almost 7 weeks I have only stopped bowing the 29th of December that makes 27 days of "period". I am eager to TTC again and do not want to waste another month of trying.
I have started bbt again since a few days and my last opk was about a week ago and it was showing positive still I will take an opk tonight to see if it finally shows negative.
I would like to hear othe people experience on how long it took to ovulate after miscarriage and what way you used to detect ovulation ?
I am a little scared to miss the most important week because of false opks :(
Thank you everyone for reading and sharing !