Is it period?!?

So in a day or two I should probably get my period and I actually have some signs since Monday except tender breasts and idk why... the thing is when i go to the toilet, i see something really brownish which i get when my period stops and its not like fluid... idk if AF is coming but when i feel like bloods coming out its just that brownish dense thing especially when i wipe the area.. what do you think?