Am i not ovulating??

If i get a regular period does that mean I am ovulating? Im concerned because I have been using opks and it doesnt look like theyre getting dark enough to be a positive opk and they started getting lighter again, so I never got a positive dark one, and that makes me wonder if I am just not ovulating???? I have been trying for a couple month & this is first month tracking with opks so im concerned that is the reason i havent been able to concieve

I have had 2 miscarriages in the past and 2 healthy babies and it was never an issue concieving any of them, It was 1-2 tries for all of them