Please Help.. Anyone :/

I am ttc but i have some questions and hopefully somebody can help me here. Ok here it goes, please try and stay with me. My problem is idk when i am ovulating and im trying to figure it out. I've always had an irregular period, i had implanon and nexplanon on for 4 years therefore i didnt have to worry about AF and finally removed it last year in Aug because my husband and I decided we wanted #2, i have a son who is now 5 yrs old. Up until February of this year i still wouldn't get AF so I kind of forced it, i read all over the internet how to get a period started so i tried the eating alot of Oranges method and voila it worked yay. March, April, May, i got AF every 21st which was the first time being regular in a long time. My cycle was 31 days, however i tried ovulation tests and never got a positive and honestly got discouraged testing because it was always negative, unless i was checking on the wrong days. On June i didn't get AF and no not pregnant. This month i got AF back July 9-15 so now im more lost on when i should be ovulating because this puts me at a 40 day cycle I think :/ i really don't have a clue on how to figure this out if anyone can help me figure this out it would be wonderful. I get so discouraged not getting those 2 positive green light lines :( I have had CM but it always seems like very little to be a sign of ovulation am I wrong?

P.S. sorry for the long post, and the lack of Glow lingo still new to Glow (but i love it)

Sorry if I posted this on the wrong post

:(