Certainly there were other things that affected the quality of the high, but I've not seen any evidence for major psychoactivity of cannabis compounds other than thc.I think it had to be more than THC; not only were there no visible trichomes, but it would have had to be very green THC, and this was a mellow, happy, INTENSE high that lasted for a good 7 hours.
There are some trichomes that are hard to see besides those big mushroom shaped ones.
Every cell in the plant has programmed into its dna how to produce thc.
I suspect that thc lives other places in the plant, in addition to the vast majority that exists in trichomes, and you might've gotten evidence for that.