I have had bad headaches, bloating, sore breasts, acne breakouts, and some mood swings, but I barely had any cramps. I am pretty sure I just got my period, and it is on time, however it is extremely light, and I am usually a heavy bleeder. It's a brownish color and is kind of like discharge. Is this a possible pregnancy or just an irregular period? I have been quite stressed lately, exercising more than I normally do, and also changed my diet a little bit.