should I give up at this point?

Brittanie • Mommy of a beautiful 4yr old girl and I am pregnant with another baby girl due February 2018 💕 couldn't be happier! 👶🏼
I think I ovulated on 9/2 and I had what I thought was IB on 9/8 and I am suppose to start AF between 9/15-9/17. I took a clear blue and got a BFN this morning FMU. 😢
I have all normal AF symptoms. Should I just consider myself out this month? 
This was what I that was IB on 9/8 

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