Be very, very careful with the cohoshes. They are VERY strong and will work fast. You should really only use under the direction of a midwife or someone knowledgable with herbs.
My MW gave me a TINY bit of black cohosh towards the end of my labor to bring my contractions to a better regularity. I took the one swallow she gave me(which she mixed with water) and no lie, 5 minutes later Ethan was born! It is VERY intense stuff, as close to pitocin as you can get really. It intensified my labor very quickly, and obviously since E was born literally minutes later!
So proceed with caution and since you are only one day over your "due date" I wouldn't do anything until it is a necessity..I truly think that all of my "move things along" remedies made my labor more intense and painful, so I would avoid interventions if you can!

Baby will come when he or she is ready(but I SOOO understand your impatience!

)