Should I harvest now?

Hey guys, This is my baby. I believe she is in her 5-6 week of flower but not quite sure when exactly she started flowering. I want to harvest when trichomes are 60% cloudy and 40% clear. I want a HEAVY head high, and very little couchlock effect. So this is my first grow and I'm asking you, should I harvest now or how long should I wait?? The strain is indica dominant and I think It's a pineapple white widdow cross. Thanks.