Maybe not pregnant??

So I am 37 days late on my period and I took a test two weeks ago and it said negative.

A little back story on my birth control/period situation.

I stopped taking birth control last October. And by the end of October I had a period. And then again two weeks later, and then again two weeks after that. My last period was May 4-8 of this year. And now nothing. Not even spotting. I still feel like I’m ovulating some weeks. But other than that nothing. Any clues ?!