From your description, they are not ready. As bigguy said, the pistile are not an accurate guage of ripeness; I had a few plants a while back that all of the hairs turned orange at about week 5 and they weren't even close to beign finished, the pistils turned raspberry and purple by the time the trichomes were 10% amber. Depending on your strain you will have a 7 to 14 day window for harvest when they are ready, and you usually have about 2 to 3 weeks from when the trichomes are clear to milky, so I wouldn't get worried yet.

JSG.