Period is always late

My period was supposed to come on Monday then I noticed that I had brown discharge I guess like blood in it then today when I went Pee it had very very light blood on the tissue when I wiped in it's no possible way for me to be pregnant because my tubes are bad and I need <a href="https://glowing.com/glow-fertility-program">IVF</a> in order for me to get pregnant but why is my period doing this most of the time I'm late but I never have symptoms like this has ever happened to anybody