When did I ovulate?

Katie • 27 years old, married
Last cycle was my first proper one after withdrawal bleed from BC and I was sure I ovulated on CD17 (first peak on cd16 with clear blue dual hormone and pain on cd17)  I then had a 13 day luteal, 30 day cycle.
​This time I thought would be the same-cd17 but of my 3 apps, 2 are telling me cd16 which is my first day of a peak reading on clear blue. What do you think based on these charts? Please note that I have gone through a sad trauma on cd16 (although my temp was taken before this). Don't know if this affects the next day reading. I just don't know when il be due AF or how many dpo I am. 
 

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