Ovulation is delayed by 5 days

Normally, my ovulation is around the 14th of every month. However, in recent months, it has always been brought forward or pushed back a few days. I consulted doctors but they couldn't determine the cause. I feel very worried and don't know what to do.

I knew that if I kept waiting, I might miss the best opportunity to get pregnant. However, I don’t want to give up hope. I was wondering, is there any way I can get pregnant as quickly as possible? Or should I consider other solutions, such as using other forms of birth control?

Thanks!