Hi A.,
My doctor stripped my membranes at about 38+ weeks- and I was at 3cm/maybe 30% (on Monday)... he told me "see you tonight"- well, I did bleed/spot for the rest of the day and into the next, but it did not send me into labor. Wednesday morning I started to lose my mucus plug- and had blood streaked goo, but no cramping. Thursday- again more blood streaked goo, but no cramping. I went hiking Thurs morning- felt great- no contractions... But contractions did start about 7pm that night. Friday morning I lost the rest of my mucus plug- and was having very consistent contractions- so we went to the hospital... My son was born at 1am on Sat...
So... I would say that I had "spotting" almost that entire week- but because I wasn't cramping or having contractions- it just wasn't time. I'd say if it's more than spotting- and it's actually very bloody discharge- just go in and get checked- 2nd babies are known to come faster!!! But realize that your baby will come when she's ready- stripping the membranes only works if she's ready! :)