It looks like peak was cd15 but I'd keep testing in case you get a higher peak later. Sometimes ovulation doesn't happen the first time so your body tries again.
@Tanya yeah that's what I'm thinking has maybe happened 🤔 cramps have been strong front and back since like CD 8/9
LH always fluctuates. It’s the colour of the strip - the test line needs to be as dark, or darker than the control line for it to be positive/peak.