Period Clots

Georgia
Okay girls, please help me! 
I'm on my 3rd day of my period and I've noticed that I've been having huge, rock hard blood clots. The clots range from the size of a 10 cent coin to the size of my entire thumb. I'm not too worried as I'm not feeling sick or any other side effects but it is abnormal for me so I thought I'd ask!
TIA 
Georgia 💅