Anyone ever experience this?

I was curious to hear everyone's story that has dealt with something that I am going through right now.

My periods are usually regular. Glow predicts it on time, mmayybe a day or so off but rarely. Anyway, this month my period was due the 11th. I tested when I didn't get it and it was negative. I am now 10 days late and the last time I took a test was 8 days late. I talked to my nurse and Dr they said to wait 2-3 months before worrying.

Has anyone experienced this? What was the outcome? Did you get a beta blood test?