Trichs means Trichomes. That's the frosty looking stuff on the flowers and the small leaves growing directly out of the flowers. They are little containers of the good resin containing THC that gets you high. Look at them through a strong magnifying glass or a pocket microscope ($10 at Radio Shack). They are clear and glassy looking at first and as they mature they turn hazy and eventually amber colored. Once a good percentage of them have turned amber, it's time to harvest. Early harvest with more clear trichomes will just be less potent, but still a good party high that doesn't put you to sleep. Late harvest when they are all amber will give you a heavy couch sitting movie watching high. Or as they call it around here... couch lock.
Yours are going to be okay, those are beautiful plants. Even if you pull them early, you'll still get good smoke, just not near as much.