looks like some new pistils on the top of colas oonly? Ignore ti.. it's a tiny portion of the total. don't over-ripen 99% for the 1%.
if trichoems look good and other physical observances are as expected, go ahead. pictures really don't do this justice... you have a better perspective standing there in your tent.
this is just somethign you have to do to reduce future anxiety... if you feel it was too early this time, you know to have a bit more patience next time. If the calyxes aren't plumping anymore, it's not far off, and you won't ruin anything if you do harvest at a slightly less than ideal point. in a month or two of smoking you won't even care about it, lol.