Brown Period Only

I don’t really know what’s going on. My period is always heavy, red, clots even (ew).

I woke up Monday morning to a brown period. I didn’t even fill a tampon through the day. I had only brown, only in the morning. Barely even needing a panty liner (only cause I didn’t want to risk ruining my panties at work) Everyday for four days. What could be going on. Is this my period? Or something else?