would love some advice please

Hello everyone so my cycles have been playing up on me and not sure if ovulating or not! Blood work and ultrasound done and all normal did blood work again on day 21 and waiting on results now. I got strong lh surge in opk test cd 15 alongside a dip in bbt however the chart is saying cd 18 as thats when there was a clear bbt shift and that's when my cf was more watery/eggwhites. Would really like to hear someone else's interpretation of my chart at the minute. Many thanks in advance x