i had a S&S on thursday 16th dec 10 and my baby boy was born at 4:23am on the 18th
i didnt get any blood from the s&s on the thursday but when i woke friday morning i had my mucus show ALL day and by the time midnight come i started having regular contractions and quite close together lasting around the 1 minute per contraction, i got to the hospital at 2am and was already 4cm dialated (may i add on the thursday i was already 3cm dialated) so this is why they did the s&s then at 3:20am my waters broke and yeah at 4:23am he was born

So goodluck honey im pretty sure your going into labour, sounds like your doing exactly what i did, hopefully you will have a little bubba tomorrow morning