Confused

Maybe I'm just clinging to straws but usually when I get my period it is really heavy and super painful but this month it is two day earlier than expected and I only really bled for 2 days when usually I have a 4 day period and there were no clots it wasn't heavy or painful and now that I've stopped bleeding my boobs are really sore when usually there sore a week before my period , possibly pregnant or just crazy ?