Ovulation ??

Nele โ€ข Mc7.2016๐Ÿ’” Rainbowbaby๐ŸŒˆ Y๐Ÿ‘ฆ๐Ÿผ18.8.17. Mc12.2019&9.2020๐Ÿ’”Ttc rainbowbaby2๐Ÿ€

I now for a fact that i ovulated on monday, had a positive opk on sunday and i had an ultrasound and my egg was ready to relase, so why dont go my temps up? Can someone please help me?

I am so confused , i really hope this is our month. Last month naturally so ๐Ÿคž๐Ÿป๐Ÿคž๐Ÿป๐Ÿคž๐Ÿป