Blood clot! (Freaking out)

Yesterday I started my period, with a heavy flow and bright, bright red blood/flow. No symptoms (no zits, no cramps, no boob pain, etc), which I always get before and during my period. Today I went to the bathroom, and I noticed in the toilet a big and weird thing floating. I’ve never had penetrative sex, so, the only thing it could’ve been was a clot, right? Something totally normal I shouldn’t be freaking out for, right?

Thanks😰