How long do you wait?

How long do you wait before going to see a doctor for a missed cycle or two. I'm currently on CD 59 with no sign of AF. No tender boobs like usual, nothing going on. I just want my period to start so I can try again or to be pregnant but I took a test today and nothing so I'm pretty sure I can rule that one out. 😞 I'm not sure if there is an amount of time before seeing a doctor. Some things on google say 60 days, others say 90 days..