Fertility & Ovulation

Hey girls , me and my boyfriend have tried twice getting pregnant 😭 i havent had a period since May 2-6 2018 . My periods are ALWAYS irregular , it has for a few years. I was once on birth control pills for a few months & my cycle was flowing smoothly . I got off because of the sickness and not eating and so on. I had 2 periods i think since ive been off birth control . In july 25 or somewhere in there, was the first time we tried them august 2nd. He said he tried once before july 25th but dont know exactly when. I do have creamy white stuff but it's always been there until i took antibiotics & it stopped & came back . I thought i was having sighs of pregnancy but i think it was just a mind thing. Can somebody please help us out with the fastest way possible. & no im currently not on birth control and dont have a period . I was told you cant get pregnant with ovulating so , comment below‼️‼️