I had a lot of spotting the first week I started the parasite cleanse too. Although my periods are fairly regular, I am in perimenopause, so I'm not sure how to interpret this. I read somewhere that the Black-Walnut hulls are good for circulation as well as their anti parasitic and anti-fungal properties.
Another thought is that parasites often cause liver blockage. Since the liver helps regulate hormones, perhaps this is another reason for the changes. Whatever the reason, I am glad you are seeing results. I hope the parasite cleanse will bring you even more relief from your long term health problems.