Coriolus Versicolor

Yes and yes would be my answers with caveats. The functions and clinical effects of coriolus versicolor are somewhat well studied but not broadly by any stretch. It is seen as having anti-cancer affects and in some countries, Japan most notably, it is a common mode of treatment for certain cancers (esophagus, colon, etc.). Generally speaking this would be safe during pregnancy as it is largely an anti-oxidant with anti-cancer properties, but there are no clinical studies that I know of looking at potential implications with pregnancy.

As far as whether or not this could influence your period - probably not directly, but the stress of dealing with cervical dysplasia could easily do just that. I would wait to see if you are in fact pregnant before exploring whether or not your period was modified. More than likely, even if it did contribute to a change, it would be a one off event and by most views probably a good thing which shows your body recalibrating hormone levels.