I think the first couple periods are usually a bit heavier. Mine weren't but some women have heavier ones.
Mine were super heavy and more clots for almost a year after giving birth. I spoke to my gyno about it, since they always worried about the clotting. But that's just normal for me.
Mine were very heavy with a lot of large clots and did not get lighter for well over a year. My doctor was not worried about it.