Ovulation right after mc...?

I suffered an early miscarriage on August 22nd and bled for 5 days. Since it was a chemical, my doctor said we could resume sexually activity as soon as the bleeding stopped. I’m currently 12 days before af and I’ve been exhausted for the past 3-4 days. I fall asleep everywhere even if I had a good nights sleep. No insomnia or anything like that. Could I have ovulated right after the mc bleed? Extreme fatigue is always my first pregnancy symptom but it seems so unlikely...🤷🏼‍♀️

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