Answer

In the name Allah the Sublime

From your question I understand that you bled for a period of three days, it doesn't matter if it was a little or if it was abundant. This blood counts as Haiz because it was for three days. It doesn't matter that the bleeding stopped in-between the three days because the bleeding intervals of these days will be accumulated.

The Salaah you read will not need to be repeated because you were in the cycle of Haiz. There is no sin on your part for praying the Salaats, as you were unaware if it was haiz or not.

Reference:
Al-Hidayah
Al Bahrur Raik vol.1

And Allah knows best
8 October 2005