Need help

Hey guys so my period was due 4 days ago and still nothing! We’ll kind of. Today is my second day or having just a little bit of brown discharge. But still nothing! Idk what this means or anything but when I looked it up all the things were about pregnancy but I haven’t had sex since October and I got my regular periods then. I’m scared and I don’t know what is going on. Can someone help me😂?