Soooo is it true...

So I stopped birth control about a year ago because I no longer want the synthetic hormones in my body. I wasn't born with them and basically want my body to be me inside. Weird maybe but my choice. Anyways I would not let my boyfriend go inside of me since stopping, however, the whole tracking temp etc could I potentially let him go inside of me with very little risk of pregnancy if I am not ovulating during this time? I realize glow gives you a percentage chance of pregnancy but I want to know if any one else does this and has had no pregnancies?  Thanks !