Strange filaments between the trichomes

Trichs are awfully sticky and lots of errant things get stuck - cat hairs, your hair... that might not be what this is but it certainly is not mold! Everything looks great to me.... but I question your thinking as to when you'll harvest.. From what I see, your trichs are still pretty clear and just starting to get milky... if you want a head high only, wait until they're all milky before you harvest.... if you want some relaxation as well, wait until 10-20% start turning amber... at 50% amber, you'll be couchlocked and the THC will be starting to degrade. I personally think you've got another week or two to go... but it depends on what you want from your smoke. Good luck!