Help ASAP PLZ!!!!

So, I was supposed to start my period last week and it didn’t come, so I’ve been waiting for it since. Ok, so yesterday I began to have cramps...no period. Today, I have had cramps allll day! Except the weird thing is, is that I found some brown discharge in my underwear... what’s going on?? Usually AFTER my period I will have the brown discharge... but cramps AND brown discharge?? What does this mean?? Maybe I am just freaking myself out! Idk): Any help would be appreciated!