When do I get help?

Karlee • Boy Mom Survivor 💙😂
Fo the first two months we didn't 'try.'  I was still coming off the pill and didn't think there was much chance anyways. The last two months I started tracking my cm and now I'm taking opk tests. I can't figure out when I'm ovulating. All of my opk tests that I take during my fertile period (predicted by glow) are all negative. I never use FMU, and I can't always do it twice a day because of my demanding job, but I thought I would of caught it. All my lines are there but faint. And my CM turns egg white but never stays that's way. Egg white in the morning, but not later in the day. 
In the end, I'm not even sure I'm ovulating. I'm scared I'm not. My cycles tend to be long as it is and my periods are light and hard to track. 
We're going on almost 5 months of trying. When should I seek help from my doctor? I'm 28 and healthy as far as I know. I did all my preconception tests and all fine.