Pregnant or not???

So my Period was due 03/14/15...i started to bleed on 03/16/15 it was bright red then when i woke up the next morning it was all brown then the next day there was nothing on my pad so i put a liner on and got like a inch of the brown blood on it allday then it was gone 03/18/15 i was having cramps but they werent like period cramps my boobs were hurting but not symptoms...just excessively tired and frequent urination but that could mean anything some one help should i test or dont even waste my time?