Unhealthy Stress and need of advice?

I started a new job and two summer college classes around the same time. A person could say that I’m a little stressed. Other thing I was weaned off my anxiety medication lexapro. The problem is that my period has been MIA for 37 days and I’m getting worried as today (06/17/22) was supposed to be the last day for this month. There is no possible way of pregnancy, so I know it is not that… and before anyone comes at me, “How do you really know tho?” Virgin…

So how long do I let this continue before contacting my doctor as I have never missed a period?