Im so confused!!!

So.. I do have irregular periods (39 day cycle). I'm sometimes 2-4 days late. The latest I've ever been has been 7 days. According to Glow, I'm right now 20 days late. I've taken 3 tests and all negative. My last period was April 27th. BD on May 21-22(after midnight in my fertile window) period was due in the beginning of June. Last time I took a test was June 15th. Anyone have any thoughts? All I'm having is cramps and going to the bathroom constantly. I'm not quite sure what's going on. if anyone needs more info, I can give it! :) Thank you!