Fluctuating temp

Hey

So last month my chart was on point. Bi-phasic cover line peaks ovulation detected period started at new prediction once ov detected. However this month completely off no coverline temp up and down like a yo yo no ovulation predicted just remained as what the app initially predicted opk matched that too.

Any idea why my temps are fluctuating soo much this month am i doing something wrong. I do it pritty much same time every morning on the inside on my mouth against my cheek i do find if i do kne side i get 1 readying other side a diff reading 🤷🏽‍♀️. The first few days i had bad sleep so i get why that was up and down. Is my body just not producing the right hormones this month as my temp is way off. Ive attached a copy of my chart. Any ideas pls ladies. Thankyou