TTC and ovulation

Vicki
Ok I came off the Mirena 5/11. Took contraceptive pills for a week,
And my OH and I decided to TTC so I stopped the BC. Last month AF came and was very heavy. Been TTC since but no egg white CM. Is it possible to conceive before you see the egg whites? Or maybe I haven't ovulated....this app says I have but not sure whether to trust it as I'm not entirely sure if my cycles are back to normal!