Good evening. I think my period has started. Two weeks ago, bleeding …

Good evening. I think my period has started. Two weeks ago, bleeding (lochia) stopped after which there were mucous discharge. And now for four days again with blood, but too abundant and with clots of blood (like a penny size), I change the pad every two hours. Is this menstruation or is the uterus further cleaning itself? I feel normal, as usual, only one thing worried me - For a couple of days before the discharge, my breasts hurt badly, I thought it was mastitis, but as soon as the discharge began, the pain went away. What do you think? Should I worry about a doctor? Because in two days I'm going for an examination.