Period late

My period has always been irregular on the time it comes. There can be any where from 27-52 days in between my periods. And this app always says I’m late. So my current fwb got a hold of my phone the other day and saw the notification from eve saying that I was supposed to start my period 4 days ago and he started freaking out thinking I’m for sure preggo and me knowing my body was like nah I’m not it’s “late” just like it always is. Last period eve said my period was 15 days late. So I wasn’t really stressing till his words got under my skin and I was worried what if I’m really pregnant. So today on 8 days late took two test both negative. I’m just relived now. Because I was stressing myself out over nothing.