period:/

So, i have been taking my birth control irregularly but always double up the next day if needed (i’ve been busy i keep forgetting i suck sorry!) anyway. i usually start my period by wednesday or thursday but it hasn’t came yet! me and my boyfriend always use a condom and the last time we didn’t was awhile ago and i’ve gotten my period since then. but i get brown discharge every time i’m about to start my period, and i have it now. BUT I HAVENT STARTED MY PERIOD ! tomorrow’s going to be friday. should i be worried ?