help needed am lose with the bbt 😭

Maricica β€’ Mummy to Ella born sleeping 23/7/17 πŸ‘ΌπŸ»πŸ’ mummy to josh born 19/5/18 πŸ’™πŸŒˆmummy to maddie born 18/5/20 πŸ’–πŸŒˆ
Am not sure what am looking for with my bbt af should have been here on Wednesday and it still not here am not sure when I ovulation 😭