Can you have a regular period and not ovulate

Hey I’m 26 and I’ve been Ttc for the last 3 months my period comes every month. This month I decided to purchase opk to try and really narrow down the days of when to really try !

I have a couple apps that track my period but they tend to give me different ovulation and period dates. 2 apps say ovulation was yesterday , 2 say today, 1 says tomorrow and 2 says Sunday ( 🤦🏾‍♀️ I know I have 7 ) I took the first 2 yesterday and 1 this morning ( I realized I should start taking them later )

My concern is that by Sunday ( the last apps ovulation date) that it won’t be dark enough. Is the timing of when you take the test really important ? And is it possible that I don’t ovulate ? I don’t have pcos however I am overweight I weight288 n I’m 5’7. My doctors have told me to start trying so that’s what I’ve been doing.

Any insight, reassurance, experiences and all that is greatly appreciated. 🤦🏾‍♀️ I know my journey is not as long as most but I really want to be have a child .

I’ve also recently taking a pregnancy test and it was negative. My first day of my last period was April 26-30. And since May 1st we’ve just been going at it.