Could it be implantation bleeding if bright red and very heavy with signs of clots?

Bright red, heavy bleeding with clots is not typically associated with implantation bleeding. Implantation bleeding is usually light, spotting-like, and pinkish or brownish in color. Heavy bleeding with clots suggests a different cause, such as a menstrual period, miscarriage, or other medical condition. If you are experiencing this type of bleeding, it is important to see a doctor promptly for evaluation and diagnosis.