Late ovulation. Is it possible i already ovulated or?

tory

So a little explanation, according to Glow i was supposed to ovulate on march 4th. last Thursday. I am taking ovulation tests and in my opinion i thought it was positive or just about positive it’s about the same color at the control line. then it was negative but never super negative still almost there coloring. So i keep taking them because i’m not sure what is going on. I got another very positive test yesterday and again today very positive. so could i be 5 days late ovulating? I have a very on time 31 day cycle. If i just ovulated my 12 days wouldn’t even be up before i start my period. i’m so confused