Cassava root side effects?

Does cassava root/twins have any side affects? day 3 of taking it and it's now day 3 passed ovulation and my boobs are unbelievably sore to the point where I gotta keep a bra on at night to sleep comfortable. Is this normal or am I pregnant? Prior to cassava root I was on geritol for a month and once i finished the bottle i started cassava the next day.