Rachael,

Many women with MS find they have an increase in symptoms before or during their periods. Hormonal changes can affect symptoms, temporarily --http://www.nationalmssociety.org/abo...use/index.aspx

As for myself - I see an increase twice a month - just before ovulation and again just before my period. Once I start either of those my symptoms go away. I never thought I would say this but I am thankful once I start my period

It's important to note: this phenomenom is not seen in just MS but those with other types of disorders/disease.