Ovulation help

Hi so I’m only tracking to get a idea of my ovulation before I try next month to conceive. I think my positive peak was cycle 13 for sure because I’ve been tracking and around the 12-15 is when I get more cervical mucus and temperature gets high. Also I got a positive strip on the cycle 12 But I’d like to know you ladies thoughts. These are my strips from cycle 11-15. Could anyone give advice when they think my peak was for sure. I’m new to this but have been tracking. But wanted to get some advice. The strip are in order from top to bottom. The last strip is today where it shows my lh dropping. Thank you in advance