Fertilitea

Has anyone ever used fertilitea? I recently started drinking 1-2 cups/day. Usually my cycles are 27-28 days long and I seem to always ovulate on day 14 ... but since I started drinking fertilitea this cycle I ovulated on day 18. Has this happened to anyone else? I realize this could have just happened by chance, but at the same time I'm worried this tea is messing up my cycle. ​