4 days late 🤔

So according to Glow I was supposed to start my period last Thursday, and it's usually always spot on, I haven't started it yet, but today maybe an hour ago, there was light pink & some brown when I wiped. I have endometriosis so even when I'm about to start it the cramps are insanely painful and I don't have that now, just light cramping here and there that doesn't bother me. I will probably test tmrw if it stays this way but I'm just wondering if anyone else has experienced this & ended up pregnant. Thanks in advance! ☺️