Bbt - someone please explain!!??

Brandi-lea • Khaleesi-May Dizney Van Vliet - my precious daughter born on 23.6.15 👶🏼🌸
Right. I don't get my chart. There was a huge dip at 14 dpo and then it's rose since. I was under the impression that whrn it dips that low, then it rises for 3 consecutive days after that means you ovulated the day of the dip. But other people are telling me differently! Could someone please explain clearly how to read a bbt chart and also take a look at mine and tell me what you see? Thank you x