My current cycle is 41 days. I have only had 1 regular cycle for the past 7 months, but I haven’t had my period this delayed since January (55days), and I wasn’t sexually active then.

This app says my period’s 8 days late. I had unprotected sex on the 24th. I took a pregnancy test yesterday (11 days after sex), it came out negative. I took another one this morning, and also came out negative. I have felt some minor cramping (no other symptoms), but still no blood. Any thoughts?