Only had light bleeding, random blobs of discharge??

So basically my period was spotting, then just a few hours of blood once a day for two days, then the rest was spotting, and then it's been one blob of brown discharge. I don't understand what's going on. I'm peeing all the time and exhausted and emotional and usually I chalk this up to my period, but they're usually five days long. could this just be an abnormally short period of could I still be pregnant?