No period for two months

Hello all my last period was April 13, 2020. I have not had a period since then my cycles are usually irregular but has not been this long without a period since I had a miscarriage last year. I took a couple pregnancy tests at day 49 and 54 of my cycle and they were negative. I am currently on day 64 of my cycle and nothing no blood no cramps no breast tenderness. I have an appointment on next Tuesday. But I was wondering if anyone else experienced this and ending up being pregnant with taking tests that late in the cycle and them being negative