Idk what's going on??

I am supposed to see AF soon if not already!!! Atleast from my calculations idk I have had some light bleeding also some dark brownish stuff:( looks like thin string like ..maybe clots or dead eggs :( but then stops... I have not had a regular flow.. Not even enough to wear anything? I guess I should wait it out and see if I start fully.. I have been kinda on the emotional side lately but figured I was going to start.. Does anyone know why?? Not much I can do but what and See:) any advice?