AF over a week late and BFN tests

Mo

Could there be something else up? Any one have any experience with this?

I stopped taking birth control in October and have had regular cycles since. This is the first month I just have not had AF and have taken three pregnancy tests all negative. I had cramps right before AF was supposed to show then nothing. Thoughts? I’m a bit worried... we are TTC so now I’m worried there is something wrong with my body!