Anyone else deal with missed/late period anxiety. I’m always worried I’m pregnant

I’m 42 and have been having perimenopause issues for a couple years. I’ve never missed a period in my life. I had a 40 day cycle once last year and my cycles have been between 14-40 days in the last few years. I’m nearing day 50 without a period and it’s making me anxious. To be clear ny husband has had a vasectomy and I have had fertility issues in the past knowing it would be difficult to get pregnant and I have never been pregnant but I can’t stop worrying about it. I don’t know how I can get through the next 5-10 years of irregular cycles without constantly feeling anxious about it. I can’t take hormones due to health reasons so I can’t take anything to regulate my cycles either . I feel silly but I can’t be the only one that gets stuck with this irrational anxiety .