Ovulation question

So I tested Monday Tuesday and Wednesday and had equal colored test and today it was negative I’m not supposed to ovulate until the 15 or 16. I’ve never had this happen to me. Has anyone gone through this? What does it mean? has anyone ovulated a week before they were supposed to? This was my test those 3 days the last one was today. Afternoon urine not morning.

Monday

Tuesday

Wednesday

Thursday