Period or Just Spotting ?

So, today I got my 'period'...or I think. Well anyways, My last period was the 16-22, but it came 2 weeks early and it was normal. So, I was supposed to start my period December the 19th, but I was late (most likely due to stress) and when I woke up and wiped this morning, there was blood. After like 5 hours of wearing a pad, I checked to see if I needed to change it and there was only a brown stain about the size of my clit. When I wiped it was brown too. Is this my period or is it spotting? I've had a 'period' like this before and when I peed, it burned a little.