Thanks for the query.
which is vitamin B6, it comes under category A drug in pregnancy according to FDA.
Means according to studies no adverse effects noted in fetus.
Pyricontin-f contains folic acid
additional to pyridoxine. Better to take this as folic acid is essential for the neurological development of the baby.
Your spotting may be postovulatory bleeding in part of mittelschmerz
For more details: http://srsree.blogspot.in/2012/08/mittelschmerz.html