AF late BFN

I was due for AF September 5. Still no sign of it. I've never been more than 2 days late. I've always had a regular period. No problems. However I took a couple pregnancy tests which have said negative :(  any input?  I'm sure I can call my dr for a blood test. There's also part of me that just "feels" pregnant. I feel different. I feel happy. My husband feels the same. Has this ever happen to anyone? Testing getting negative but no AF? I bought an early test I'm going to take in the am. Fingers crossed for a positive!! 🙏