Ovulation finally on schedule?

Interesting thing has been happening. I started taking supplements to help with my egg quality and overall health. This month I have drastically cut down on carbs because I knew I wanted to start Keto. When I’m telling you I’ve been on it a few days and already see a difference. My opk tested positive today, I never test positive this early. I’m on CD16, usually I test positive CD 21 or somewhere about there. My ovulation was supposed to be a few days later, so I am really surprised. Only thing I can think of is the Keto diet, because I’ve been on the supplements for months.