When should I see a doctor?

So I’ve posted about this before but never really got the answers I was looking for. We’ve been TTC for basically a month. I stopped taking my birth control and finished my pack of pills. When I was on birth control I got my period once every three months. My last period ended on May 9th. It’s different for every woman when they will get there next period after birth control. But when should I get concerned and call my doctor about my period not showing up?

It’s been hard TTC and not knowing when I’m going to ovulate (besides buying the tests) or when I’m late for my period.

Thank you.