What’s going on with me?!

Okay so last month I got my period it lasted only 2days! It normally last 7! Now it’s that time of the month again and yet aunt flow has yet to show up but I am cramping like crazy && I’m a couple of days late! I took a test last Monday and it was negative. So should I just wait on my flow or should I go ahead and test again?! Stupid periods 🤦🏻‍♀️🤦🏻‍♀️