Labor before scheduled csection

When do I go in?

Im scheduled to have a csection on the 5th but the night of the 29th I had 5 hours of contractions last 1m15seconds that were 27-22 min apart and felt from the top down into my back and down. Could also feel babies head or shoulder being pressed into my pelvis with each contraction. At what point would I head in to L&D ?? currently 37+6.